英语学习词典
  

duration

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duration [ djuə'reiʃən] n.持续,持久

duration [djuə'reiʃən] 持续,持续期间

duration [ djuə'reiʃən] n.持续的时间

duration [djuə'reiʃən] 持续时间

duration 持久;持续时间

"Arrival/Departure record"(Form I-94) (表I-94,入境-出境记录):移民归化局文件,
在美国入境地点签发,作为外国国民合法进入美国的证明。表上明确注明证件持有者许可在美逗留的期限,
或是确定一个固定的"截止日期"(expiration date),或是注上"D/S"字样。
"D/S"意为"身份有效期"(duration of status),允许证件持有者在美国逗留到达成业经批准的目的为止。

Duration of Status(身份有效期):简称"D/S"。移民归化局在表I-94(参阅"入境-出
境记录"Arrival/Departure Record栏目)上的用词,意为该外国留学生或交流学者在美国逗
留的期限为完成一个(或若干个)业已批准项目的需用时间另加三十天。

Duration 期限

进气持续角
intake duration angle

气门开启持续时间
valve duration

喷油持续角
fuel injection duration angle

It is not the strength but the duration of great sentiment that makes great men.
造就伟人的不是力量,而是伟大情操的持久。

Duration 持续时间

长短 [cháng duǎn] /length/duration/

持久 [chí jiǔ] /duration/endure/lasting/

短促 [duǎn cù] /(adj) short in time duration; fleeting; brief/

简短 [jiǎn duǎn] /brief/short-duration/

久 [jiǔ] /(long) time/(long) duration of time/

年头儿 [nián tóu er ] /(n) a year's duration/(n) many years duration/(n) times; era/

无限期 [wú xiàn qī] /unlimited (time) duration/

Forgetting clearly aids orientation in time, since old memories weaken and the new tend to stand out, providing clues for inferring duration.
显然,遗忘有助于时间的定位,因为旧的记忆淡忘,新的记忆往往就突出,从而为推算持续的时间提供线索。

{adj: abbreviated, shortened, truncated} cut short in duration
"the abbreviated speech"
"her shortened life was clearly the result of smoking"
"an unsatisfactory truncated conversation"

{adj: authoritarian, autocratic, dictatorial, despotic, tyrannical} characteristic of an absolute ruler or absolute rule; having absolute sovereignty
"an authoritarian regime"
"autocratic government"
"despotic rulers"
"a dictatorial rule that lasted for the duration of the war"
"a tyrannical government"

{adj: brief, little} of short duration or distance
"a brief stay in the country"
"in a little while"
"it's a little way away"

{adj: coextensive, coterminous, conterminous} being of equal extent or scope or duration

{adj: dateless} of such great duration as to preclude the possibility of being assigned a date
"dateless customs"

{adj: drawn-out, extended, lengthy, prolonged, protracted} relatively long in duration; tediously protracted
"a drawn-out argument"
"an extended discussion"
"a lengthy visit from her mother-in-law"
"a prolonged and bitter struggle"
"protracted negotiations"

{adj: episodic} limited in duration to a single episode
"an account concerned primarily with episodic events such as the succession of rulers"

{adj: full-term} gestated for the entire duration of normal pregnancy
"a healthy full-term baby"
<-> premature

{adj: isochronal, isochronous} equal in duration or interval
"the oscillations were isochronal"

{adj: livelong} (of time) constituting the full extent or duration
"all the livelong day"

{adj: longtime} of long duration
"a longtime friend"

{adj: long} (of speech sounds or syllables) of relatively long duration
" the English vowel sounds in `bate', `beat', `bite', `boat', `boot' are long"
<-> short

{adj: long} primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified
"a long life"
"a long boring speech"
"a long time"
"a long friendship"
"a long game"
"long ago"
"an hour long"
<-> short

{adj: new} not of long duration; having just (or relatively recently) come into being or been made or acquired or discovered
"a new law"
"new cars"
"a new comet"
"a new friend"
"a new year"
"the New World"
<-> old

{adj: old} of long duration; not new
"old tradition"
"old house"
"old wine"
"old country"
"old friendships"
"old money"
<-> new

{adj: prolonged} (of illness) developing slowly or of long duration

{adj: quantitative} (of verse) having a metric system based on relative duration of syllables
"in typical Greek and Latin verse of the classical period the rhymic system is based on some arrangement of long and short elements"
<-> syllabic, accentual

{adj: short} of speech sounds or syllables of relatively short duration
"the English vowel sounds in `pat', `pet', `pit', `pot', putt' are short"
<-> long

{adj: short} primarily temporal sense; indicating or being or seeming to be limited in duration
"a short life"
"a short flight"
"a short holiday"
"a short story"
"only a few short months"
<-> long

{adj: spatiotemporal, spaciotemporal} existing in both space and time; having both spatial extension and temporal duration

{adj: spatiotemporal} of or relating to space and time together (having both spatial extension and temporal duration)
"spatiotemporal coherence"

{adj: whole} including all components without exception; being one unit or constituting the full amount or extent or duration; complete
"gave his whole attention"
"a whole wardrobe for the tropics"
"the whole hog"
"a whole week"
"the baby cried the whole trip home"
"a whole loaf of bread"
<-> fractional

{adv: concurrently, at the same time} overlapping in duration
"concurrently with the conference an exhibition of things associated with Rutherford was held"
"going to school and holding a job at the same time"

{n: acute schizophrenic episode, reactive schizophrenia} schizophrenia of abrupt onset and relatively short duration (a few weeks or months)

{n: aspect} the beginning or duration or completion or repetition of the action of a verb

{n: augmentation} the statement of a theme in notes of greater duration (usually twice the length of the original)
<-> diminution

{n: diminution} the statement of a theme in notes of lesser duration (usually half the length of the original)
<-> augmentation

{n: duration, continuance} the period of time during which something continues

{n: duration, continuance} the property of enduring or continuing in time

{n: duration, length} continuance in time
"the ceremony was of short duration"
"he complained about the length of time required"

{n: durative, durative aspect} the aspect of a verb that expresses its duration

{n: flash flood, flashflood} a sudden local flood of great volume and short duration

{n: half rest} a musical rest having the time value of half a whole rest or equal in duration to two beats in common time

{n: impermanence, impermanency} the property of not existing for indefinitely long durations
<-> permanence

{n: lengthiness, prolongation, continuation, protraction} the consequence of being lengthened in duration

{n: life estate, estate for life} (law) an estate whose duration is limited to the life of the person holding it

{n: little} a small amount or duration
"he accepted the little they gave him"

{n: longevity, length of service} duration of service
"her longevity as a star"
"had unusual longevity in the company"

{n: longness} duration as an extension
<-> shortness

{n: meter, metre, time} rhythm as given by division into parts of equal duration

{n: no-trump} a version of contract bridge in which no suit is designated as trump for the duration of the hand

{n: note, musical note, tone} a notation representing the pitch and duration of a musical sound
"the singer held the note too long"

{n: permanence, permanency} the property of being able to exist for an indefinite duration
<-> impermanence

{n: petit mal, epilepsia minor} a seizure (or a type of epilepsy characterized by such seizures) of short duration characterized by momentary unconsciousness and local muscle spasms or twitching

{n: pharmacokinetics} the study of the action of drugs in the body: method and rate of excretion; duration of effect; etc.

{n: regulation time} (sports) the normal prescribed duration of a game
"the game was finished in regulation time"
<-> overtime

{n: rest} a musical notation indicating a silence of a specified duration

{n: rhythmicity} the rhythmic property imparted by the accents and relative durations of notes in a piece of music

{n: rule} the duration of a monarch's or government's power
"during the rule of Elizabeth"

{n: seismograph} a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)

{n: span} the complete duration of something
"the job was finished in the span of an hour"

{n: system of weights and measures} system of measurement for length and weight and duration

{n: tachograph} a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle

{n: time scale} an arrangement of events used as a measure of duration
"on the geological time scale mankind has existed but for a brief moment"

{n: trump} (bridge or whist) the suit that has been declared to rank above all other suits for the duration of the hand
"clubs were declared trumps"
"a trump can take a trick even when a card of a different suit is led"

{n: value, time value, note value} (music) the relative duration of a musical note

{n: whole rest} a musical rest equal in duration to four beats in common time

{v: become} come into existence
"What becomes has duration"

{v: clock, time} measure the time or duration of an event or action or the person who performs an action in a certain period of time
"he clocked the runners"

{v: give} estimate the duration or outcome of something
"He gave the patient three months to live"
"I gave him a very good chance at success"

{v: prolong, sustain, keep up} lengthen or extend in duration or space
"We sustained the diplomatic negociations as long as possible"
"prolong the treatment of the patient"
"keep up the good work"

{v: shorten} make shorter than originally intended ; reduce or retrench in length or duration
"He shortened his trip due to illness"
<-> lengthen

{v: time} set the speed, duration, or execution of
"we time the process to manufacture our cars very precisely"

And nuisance-sensing, high-voltage " stun cushions " to silence backseat drivers for the duration.
还有一能检测讨厌鬼的高压电晕坐垫,它能让驾车过程中坐在后排对驾驶员指手画脚的人闭上口。

Both medicines have to be taken within 48 hours of the onset of flu symptoms to be effective, and are said by the companies to be able to cut the duration of the illness by up to 40%, as well as easing the symptoms.
这两药物都必须在流感发作后 48小时之内服用才能产生疗效;两家制药公司都声称各自的产品可以使流感持续的时间缩短 40%,还可以缓解流感症状。

Moreover, when the antibody was given to chimpanzees, it inhibited rhinoviral growth, and in humans it lessened both the severity and duration of cold symptoms.
此外,当该抗体被提供给黑猩猩时,它遏制住了鼻病毒的生长;而人体内,抗体则减少了感冒症状的严重程度以及所持续的时间。

The tremendous power of the event suggests a novel solution to a long-standing astronomical mystery. Scientists want to know the origins of the strange phenomenon of brief gamma ray bursts observed hundreds of times over recent decades. They say these short-duration flashes emit gamma rays in the same way the neutron star did in December and that such stars could explain a large number of the occurrences.
这次事件的巨大能量甚至可以认为是长期存在的天文学之迷的一种离奇解释。科学家们想知道伽马射线短暂爆发这种奇特现象的起源,在最近的几十年里他们观测到了几百次这种现象。他们表示这些短暂的闪亮和12月的中子星释放伽玛射线的道理是一样的。 这些恒星可以解释以前发生的一些现象。

The basic duration of injection 基本喷射时期

F05
Delirium, not induced by alcohol and other psychoactive substances
An etiologically nonspecific organic cerebral syndrome characterized by concurrent
disturbances of consciousness and attention, perception, thinking, memory, psychomotor
behaviour, emotion, and the sleep- wake schedule. The duration is variable and the degree
of severity ranges from mild to very severe.
Includes: acute or subacute:
. brain syndrome
. confusional state (nonalcoholic)
. infective psychosis
. organic reaction
. psycho-organic syndrome
Excludes: delirium tremens, alcohol-induced or unspecified (F10.4)
非因酒精及其他精神作用物质引起之谵妄 
为在病因学上非特异性之徵候群 , 其特徵为同时出
现意识与注意力、知觉、思考、记忆、精神运动行
为、情绪、以及睡醒循环之障碍。有着各种不同持
续期间且轻重程度不一的徵候群。 
包含 : 急性或亚急性 :
. 脑徵候群
. 混乱状态〔非酒精性〕 
. 发炎性精神病 
. 器质性反应 
. 精神器质性徵候群 
不包含 : 震颤性谵妄 , 酒精引起或未明示的 (F10.4)  

F06.7
Mild cognitive disorder
A disorder characterized by impairment of memory, learning difficulties, and reduced
ability to concentrate on a task for more than brief periods. There is often a marked
feeling of mental fatigue when mental tasks are attempted, and new learning is found to be
subjectively difficult even when objectively successful. None of these symptoms is so
severe that a diagnosis of either dementia (F00-F03) or delirium (F05.-) can be made. This
diagnosis should be made only in association with a specified physical disorder, and
should not be made in the presence of any of the mental or behavioural disorders
classified to F10-F99. The disorder may precede accompany, or follow a wide variety of
infections and physical disorders both cerebral and systemic, but direct evidence of
cerebral involvement is not necessarily present. It can be differentiated from
postencephalitic syndrome (F07.1) and postconcussional syndrome (F07.2) by its different
etiology, more restricted range of generally milder symptoms , and usually shorter
duration.
轻度认知障碍症 
主要表徵为记忆障碍 , 学习或注意力集中困难。当
要用脑力时 , 会有明显的脑力疲倦之感觉 ( 无力感
) , 要学习新东西时 , 甚至客观上学习的很成功 ,
但主观上一直觉得学习得不好 , 而有学习之困难。
这些症状均属轻微程度 , 所以无法作痴呆 (F00-F03) 或
谵妄 (F05.-) 之诊断。这个诊断只当有连带之身体疾
病才能诊断 , 若有 F10-F99 种种精神疾病同存时 , 即不
能作此诊断。此疾病发生於种种发炎或其他身体疾
病之前後或同时发生 , 这些同存身体疾病包含脑之
疾病 , 但这些种种身体疾病不一定有直接证据可以
显现脑部之障碍。此疾病应与脑炎後徵候群 (F07.1)
与脑震汤後徵候群 (F07.2) 做区分 , 其鉴别之重点是
病因不同、程度较轻、症状范围较狭窄、期间较短
。 

.7
Residual and late-onset psychotic disorder
A disorder in which alcohol- or psychoactive substance-induced changes of cognition,
affect, personality, or behaviour persist beyond the period during which a direct
psychoactive substance-related effect might reasonably be assumed to be operating. Onset
of the disorder should be directly related to the use of the psychoactive substance. Cases
in which initial onset of the state occurs later than episode(s) of such substance use
should be coded here only where clear and strong evidence is available to attribute the
state to the residual effect of the psychoactive substance. Flashbacks may be
distinguished from psychotic state partly by their episodic nature, frequently of very
short duration, and by their duplication of previous alcohol- or other psychoactive
substance-related experiences.
Alcoholic dementia NOS
Chronic alcoholic brain syndrome
Dementia and other milder forms of persisting impairment of cognitive functions
Flashbacks
Late-onset psychoactive substance-induced psychotic disorder
Posthallucinogen perception disorder
Residual:
. affective disorder
. disorder of personality and behaviour
Excludes: alcohol- or psychoactive substance-induced:
. Korsakov's syndrome (F10-F19 with common fourth char- acter .6)
. psychotic state (F10-F19 with common fourth character .5)
残馀及晚发精神病症
此病症是因酒精或精神作用物质引起认知、情感、
人格或行为的改变 , 此变化会较原先精神作用质引
起的效果持续续得更久。此病症的发病必须和使用
酒精或精神作用物质直接相关。要有明确及强烈的
证据显示发病是因使用精神作用物质後的残馀效果
时才能归类於此诊断。重现现象 (F1x.70) 与精神病症
是不同的 , 其区别之要点是其短暂性、阵发性、以
及其重覆先前酒精或其他精神作用物质相关之经验

酒精性痴呆症 , 其他未明示者
慢性酒精性脑徵候群
痴呆症与其他轻型持久性认知功能障碍
重现现象
晚发性精神作用物质引起之精神病性疾病
幻觉剂使用後知觉障碍症
残馀性 :
. 情感障碍症
. 人格与行为障碍症
不包含 : 酒精或精神作用物质引起 :
. 柯沙科夫徵候群 (F10-F19 与有第 4 码.6 者 )
. 精神病性状态 (F10-F19 与有第 4 码.5 者 )

F33
Recurrent depressive disorder
A disorder characterized by repeated episodes of depression as described for depressive
episode (F32.-), without any history of independent episodes of mood elevation and
increased energy (mania). There may however, be brief episodes of mild mood elevation and
overactivity (hypomania) immediately after a depressive episode, sometimes precipitated by
antidepressant treatment. The more severe forms of recurrent depressive disorder (F33.2
and F33.3) have much in common with earlier concepts such as manic-depressive depression,
melancholia vital depression and endogenous depression. The first episode may occur at any
age from childhood to old age, the onset may be either acute or insidious, and the
duration varies from a few weeks to many months. The risk that a patient with recurrent
depressive disorder will have an episode of mania never disappears completely, however
many depressive episodes have been experienced. If such an episode does occur, the
diagnosis should be changed to bipolar affective disorder (F31 .-).
Includes: recurrent episodes of:
. depressive reaction
. psychogenic depression
. reactive depression
seasonal depressive disorder
Excludes: recurrent brief depressive episodes (F38.1)
复发性郁症
疾病特徵是重覆发作的郁症 (F32.-) , 而且没有躁症如
情绪高昂、活动过度的发作病史。然而若一忧郁发
作之後 , 立即有轻微情绪高昂与过动的短暂轻躁症
发作有时是因抗郁剂治疗忧郁症所诱发的 , 仍要使
用此项分类。较严重之复发性郁症 (F33.2和F33.3) 与以前
躁郁性郁症 , melancholia , 生机性郁症与内因性郁症之概
念相似。初次发作可以由孩童期到老年期之任何年
龄 ; 发作或急性或渐近性 ; 其生病期间可以是几星
期至几个月不一定。复发性郁症者会发生躁症发作
的危险性 ( 无论经验多少次的忧郁发作 ) 决不会完
全消失。若发生躁症发作应将诊断改为双相情感障
碍症 (F31.-) 。
包含 : 重覆发作 :
. 忧郁性反应 (depressive reaction)
. 心因性忧郁 (psychogenic depression)
. 反应性忧郁症 (reactive depression)
季节性情感障碍症 (sasonal affective disorder)(F33.0或F33.1)
不包含 : 复发性短暂忧郁发作 (F38.1)

F38
Other mood [affective] disorders
Any other mood disorders that do not justify classification to F30-F34, because they are
not of sufficient severity or duration.
其他情感障碍症
严重度或生病期间不足以归类於 F30-F34 之任何情感障
碍。

F43.1
Post-traumatic stress disorder
Arises as a delayed or protracted response to a stressful event or situation (of either
brief or long duration) of an exceptionally threatening or catastrophic nature, which is
likely to cause pervasive distress in almost anyone. Predisposing factors, such as
personality traits (e.g. compulsive, asthenic) or previous history of neurotic illness,
may lower the threshold for the development of the syndrome or aggravate its course, but
they are neither necessary nor sufficient to explain its occurrence. Typical features
include episodes of repeated reliving of the trauma in intrusive memories
("flashbacks"), dreams or nightmares, occurring against the persisting
background of a sense of "numbness" and emotional blunting, detachment from
other people, unresponsiveness to surroundings, anhedonia, and avoidance of activities and
situations reminiscent of the trauma. There is usually a state of autonomic hyperarousal
with hypervigilance, an enhanced startle reaction, and insomnia. Anxiety and depression
are commonly associated with the above symptoms and signs, and suicidal ideation is not
infrequent. The onset follows the trauma with a latency period that may range from a few
weeks to months. The course is fluctuating but recovery can be expected in the majority of
cases. In a small proportion of cases the condition may follow a chronic course over many
years, with eventual transition to an enduring personality change (F62.0).
Traumatic neurosis
创伤後障碍症
源自於对某一压力事件或某种长、短期存在之压力
情境 , 以迟缓或且拖延的反应来表现。这类事件或
情境具有异常之威胁性或是大灾难的性质 , 它几乎
可使任何人痛苦。如果有某一些人格特质因素存在
的话 ( 如个性上较强迫性格或柔弱 ) , 或过去有精
神官能症 , 可能会使此种症候发生的临界点降低或
使其病程恶化 , 但它仍不足以完全解释此症候的发
生。典型症状包含 : 过去创伤的情节会一再侵入记
忆而重现 (flashbacks) , 常做梦或梦魔 , 一直感觉 ” 麻
木 ” 及情感迟钝 , 和别人疏离 , 对环境没有反应 ,
快乐感缺失 , 及逃避会使其回忆创伤的种种活动和
情境。自律神经经常属於过度激发状态 , 伴随有过
度警戒、易有惊吓反应及失眠。忧郁和焦虑常与以
上的症状、徵候在一起 , 自杀的念头也不少见。创
伤之後到疾病产生之间的潜伏期有数周到数月之久
, 但很少超过六个月。病程起起伏伏 , 但大部分的
个案都能预期会恢复。不过少部分个案会慢性化而
历经好多年 , 以致形成人格的永久改变。 (见F62.0)
创伤性精神官能症。

F45.0
Somatization disorder
The main features are multiple, recurrent and frequently changing physical symptoms of at
least two years' duration. Most patients have a long and complicated history of contact
with both primary and specialist medical care services, during which many negative
investigations or fruitless exploratory operations may have been carried out. Symptoms may
be referred to any part or system of the body. The course of the disorder is chronic and
fluctuating, and is often associated with disruption of social, interpersonal, and family
behaviour. Short-lived (less than two years) and less striking symptom patterns should be
classified under undifferentiated somatoform disorder (F45.1).
Multiple psychosomatic disorder
Excludes: malingering [conscious simulation] (Z76.5)
身体化症
主要特徵是多重的 , 再发的且频繁变化的身体症状
, 至少持续二年。大多数病人有一个既长又复杂的
病史 , 他们在基层或专科医疗中作过许多结果正常
的检查或是毫无成果的手术。在身体的任何部位都
可能有症状。病程是慢性化及起伏不定的 , 经常伴
有社会、人际间及家庭生活上的障碍。较短暂的 (
例如少於二年的 ) 和较不明显的症状两类型最好归
在未分化拟身体障碍症 (F45.1)
多重心身症。
不包含 : 诈病〔意识操作〕 (Z76.5) 。

ISCHAEMIC HEART DISEASE (I20-I25)
Note: For morbidity duration as used in categories I21-I25 refers to the interval elapsing
between onset of the ischaemic episode and admission to a care For mortality statistics
duration refers to the interval elapsing between onset and death
Includes:with mention of hypertension(I10-I15) Use additional code, if desired, to
identify presence of hypertension.
缺血性心脏疾病 (I20-I25)
注意 : 对罹病率 , 间隔为类别 I21-I25 者且被使用於缺
血性发作和住院之间。对死亡率 , 间隔为从发作至
死亡。
包含 : 提及高血压性 (I10-I15) 如有需要 , 使用其他码以
确定高血压。

I21
Acute myocardial infarction
Includes: myocardial infarction specified as acute or with a stated duration of 4 weeks
(28 days) or less from onset
Excludes: certain current complications following acute myocardial infarction (I23.-)
myocardial infarction:
. old (I25.2)
. specified as chronic or with a stated duration of more 4 weeks (more than 28 days) from
onest (I25.8)
. subsequent(I22.-)
postmyocardial infarction syndrome (I24.1)
急性心肌梗塞
包含 : 心肌梗塞明示为急性或发生少於 4 周 (28天) 者
不包含 : 急性心肌梗塞後某些现有的并发症 (I23.-)
心肌梗塞 :
. 旧的 (I25.2)
. 明示为慢性或从疾病发作起超过四周 (28天) 以上者
(I25.8)
. 继发的 (I22.-)
心肌梗塞後徵候群 (I24.1)

I21.9
Acute myocardial infarction, unspecified
Myocardial infarction (acute) NOS
Includes: recurrent myocardial infarction
Excludes: specified as chronic or with a stated duration of more than 4 weeks(more than 28
days) from onset (I25.8)
未明示的急性心肌梗塞
其他未明示的 ( 急性 ) 心肌梗塞
包含 : 复发性心肌梗塞
不包含 : 明示为慢性或从疾病发作起超过四周 (28天)
以上者 (I25.8)

I24.0
Coronary thrombosis not resulting in myocardial infarction
Coronary (artery)(vein):
. embolism-not resulting in myocardial infarction
. occlusion-not resulting in myocardial infarction
. thromboembolism-not resulting in myocardial infarction
Excludes: specified as chronic or with a stated duration of more than 4 weeks (more than
28 days) from onset (I25.8)
未造成心肌梗塞的冠状动脉血栓形成
冠状 ( 动脉 ) ( 静脉 ) :
. 栓塞-非导致心肌梗塞者
. 阻塞-非导致心肌梗塞者
. 血栓栓塞-非导致心肌梗塞者
不包含 : 明示为慢性或从疾病发作起超过四周 (28天)
以上者 (I25.8)

I25.8
Other forms of chronic ischaemic heart disease
Any condition in I21-I22 and I24.- specified as chronic or with a stated duration of more
than 4 weeks (more than 28 days) from onset
其他型式的慢性缺血性心脏病
任何状况属 I21-I22 和 I24- 明示为慢性或发作超过四周 (28天)
以上者

durabilitym 耐久性 duration 持续时间

duration of cycle 周期时间

duration of load 负荷保持时间

pulse duration 脉冲持续时间

pulse duration modulation 脉冲宽度调制

pulse duration modulation magnetic tape record type strong-motion instrument 脉冲调宽式磁带记录强震仪

signal duration 信号持续时间

sunshine duration 日照时间


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