英语词汇period hours怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	period hours
释义	period hours 简明释义统计期间小时网络释义 1 ?统计期间小时定义中文名称：统计期间小时英文名称：period hours 定义：元件或系统处于在使用状态下统计评价需要选取的给定时间小时数。该值通常取用年日历小时(8760 h；闰年为8784 h)。应用学科：电力（一级学科）短语 1 Period hours PH 统计期间小时 2 a period of two hours 时辰双语例句 1 For different individual horseshoe crabs, the circadian period ranged from 22.2 to 25.5 hours. 对于不同的鲎来说，其生理节奏的周期范围在22.2小时到25.5小时之间。 2 It usually happens in the first few hours of sleep in the period called deep sleep. 它通常发生在睡眠的最初几个小时，这个阶段被称为深度睡眠阶段。 3 They were visited during February to May 2007 and samples were taken after a waiting period of two hours after cleaning and disinfection. 在2007年5月份到他们那里，并且在清洁和消毒后的两小时进行取样。
随便看	carriage of perishable cargo carriage of refrigerated cargo carriage of special cargo carriage of timber deck cargo carriage of unitized goods carriageofvehicle carriage on deck carriage-out carriage outward carriage outwards carriage over carriage over day carriage overflow carriagepaid carriage paid carriage paid home carriage paid to carriage paid to ... carriage paper width carriagepiece carriagepiece carriagepiece carriage porch carriage positioning carriage rail

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