“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	air pollution control and health protection air pollution control chemistry Air Pollution Control Law air pollution control of mobile sources air pollution in China air pollution map air pollution monitoring air pollution prevention and control law air pollution prevention and control of collection and distribution system for the ports air pollution prevention and control of two pollution control zones airport airport allocation planning airport automatic people mover airport aviation meteorological facility airport cargo area airport cargo warehouse airport clearance zone airport dedicated road airport depot airport economy airport electromagnetic environment airport electromagnetic environment protection airport engineering airport engineering survey airport environment

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。