“serf”概念、定义、翻译-科学时代

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。

单词	serf
释义	历史学词汇手册 serf 农奴
随便看	cost per customer (CPC) cost-per-hire cost per inquiry cost per mille cost per mille (CPM) cost per mille（CPM） cost per order cost per order (CPO) cost per point cost per point (CPP) cost per purchase (CPP) cost per rating point (CPRP) cost per response (CPR) cost per sale (CPS) cost per thousand cost per thousand cost per thousand cost per thousand click cost per thousand--cost per thousand (CPM) cost per thousand (CPM) cost per thousand (CPT) cost per thousand impressions (CPM) cost per transaction (CPT) cost per view (CPV) cost-plus