英语词汇back work ratio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	back work ratio
释义	back work ratio 简明释义回功比：指在某个过程中，输出功与输入功的比值。专业释义 1 航空、航天科学技术回功比双语例句 1 In this work, the questionnaire was used for collecting data. Totally 268 questionnaires were sent out while 142 valid ones were got back. The ratio of valid questionnaire is 53%. 本研究采用问卷调查方法进行了数据收集，共发出调查问卷268份，回收有效问卷142份，有效问卷率为53%。
随便看	ordering of entries ordering of events order off ordering of grids ordering of raw materials ordering of segments ordering of vessel ordering operator ordering opportunity order out ordering point ordering point system ordering policy ordering process order quantity ordering relation ordering relationship ordering room ordering rule ordering rules orderings ordering specification ordering statement ordering strategy ordering strategy in resolution

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