“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	geographic engineering of ethnicity geographic entity geographic entity representation geographic environment simulation geographic equator geographic feature code geographic feature identifier geographic feature oriented generalization geographic graticule map geographic index of ethnicity geographic information application engineering geographic information catalogue service geographic information classification and coding geographic information cloud service geographic information engineering geographic information engineering design geographic information engineering maintenance geographic information engineering management geographic information engineering supervision geographic information interoperability geographic information map geographic information metadata geographic information property geographic information public service platform geographic Information security

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。