The duration of Estrous of Boer goat and Guanzhong dairy goat were 26.
本文通过对两个引进品种——波尔山羊与关中奶山羊发情行为比较观察,结果发现,波尔山羊发情期三个阶段,发情初期、发情末期,尤其在发情盛期的行为没有关中奶山羊的明显,发情持续时间为26。
Study on duration of comfortable temperature in forest tourist areas in subtropical zone;
亚热带森林旅游区夏季舒适温度的持续时间
All of the red tide incidents in South China Sea since 1980 ~2004,the spatial and temporal distribution of the events,and the change characteristics of the average duration of the red tides were analyzed.
收集整理了自1980~2004年的南海历次赤潮事件,并对这些赤潮事件在时间和空间的分布特征以及赤潮持续时间长度的变化特征进行了分析;探讨了形成南海赤潮时空分布特征和持续时间长度变化的可能原因。
The temperature of the reactor was lowered from 55℃ to 20℃ in case of heating failure and the duration in the low temperature were 1,5,12 and 24h respectively.
模拟由于加热失败导致温度从55℃突降到20℃(室温左右),且在20℃时持续时间分别为1h、5h、12h和24h,对高温厌氧消化处理城市有机生活垃圾工艺的影响进行了实验研究。
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;
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。
duration:Continuance or persistence in time.
"持续,持久:时间上的连续或持续."
Continuance or persistence in time.
持续，持久时间上的连续或持续
signal duration
信号持续时间，脉冲持续时间
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。
The duration of a vowel.
音延，音长元音发音的持续时间
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。
playback duration
重放期间，重放(持续)时间
minimum clock-pulse duratio
最小时钟脉冲持续时间
beam pulse duration
电子束脉冲持续时间
pulse duration selector
脉冲持续时间选择器
peak load effective duration factor
峰值功率持续时间率
colour burst interval
彩色同步脉冲持续时间
The storm was of short duration.
暴风雨持续时间很短。
How long does the variable last?
变量应持续多长的时间？
pulse duration discriminator
脉冲持续时间鉴别器
duration of relay operation
继电器动作持续时间