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人日数
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人日数
Encyclopedia
工学
膳食调查
释
number of person-days
人日数
包括总人日数和个人人日数,是指以被调查对象的一日三餐为标准折合的用餐天数,将每人每日的三餐定义为一个人日。
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shaft lining process
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shaggy mane
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