1.
the estrous cycle and duration of estrus in doe were in a small range of varia-tion in the five populations;
5个品种（品系）母鹿的发情周期和发情持续时间的变异范围较小;
2.
The duration and the interval of post-partum oestrus were 33.0 hours and 76.6 dars repectively.
产后第一次发情时间和发情持续期分别为76.7天和30.0小时。
3.
duration:Continuance or persistence in time.
"持续,持久:时间上的连续或持续."
4.
Continuance or persistence in time.
持续，持久时间上的连续或持续
5.
signal duration
信号持续时间，脉冲持续时间
6.
schizophrenia of abrupt onset and relatively short duration (a few weeks or months).
突然发作持续时间较短的分裂症。
7.
The duration of a vowel.
音延，音长元音发音的持续时间
8.
The recommended management of myxoma is wide excision to prevent recurrence.
病患门诊持续追踪一年半的时间，并无局部复发现像，亦无耳道狭窄的情形发生。
9.
playback duration
重放期间，重放(持续)时间
10.
minimum clock-pulse duratio
最小时钟脉冲持续时间
11.
beam pulse duration
电子束脉冲持续时间
12.
pulse duration selector
脉冲持续时间选择器
13.
peak load effective duration factor
峰值功率持续时间率
14.
colour burst interval
彩色同步脉冲持续时间
15.
The storm was of short duration.
暴风雨持续时间很短。
16.
How long does the variable last?
变量应持续多长的时间？
17.
pulse duration discriminator
脉冲持续时间鉴别器
18.
duration of relay operation
继电器动作持续时间