“number of person-days”的概念、定义、翻译、参考文献-科学参考

单词	number of person-days
释义	number of person-days 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。
随便看	price of the giving price policy price policy of agricultural products price quality differences of agricultural produce price regulation price regulation fund system price restriction policy for agricultural products price revolution of Europe in the 16th century price scaling law price scissors Price-Service Duration Matrix prices for irrigation water price skimming behavior Price's law prices of grass products price squeeze price stability price statistics price subsidies price support policy price system of agricultural products price tax regulation price theorem price theory price-to-book ratio

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。