“closed population”概念、定义、翻译-科学时代

单词	closed population
释义	经济学词汇手册 closed population 封闭性人口
随便看	beach capacities beach coat beachcomber beach comber beach cusp beach cusp beach cusp beach cycle beach development beach drifting beach erosion beach erosion beach face beach formation by waves beach grass beach group beach growth beachhead beaching beach jumper unit beach land beach line beachmaster beach metal placer beach mineral resources

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

closed population