“three age system”概念、定义、翻译-科学时代

单词	three age system
释义	人类学词汇手册 three age system （石铜铁）三时代划分制
随便看	floating refuse on waterway work administrating system floating refuse on waterway working system floating rent floating reserve floating reticle floating rib floating ring floating-ring seal floating rope floating shallow water nuclear plant floating slot system floating solar pond floating solar still floating speed floating spot floating spot floating stability floating stage floating stanza floating stock floating string floating structure floating supply floating swamp floating sweet grass

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。

three age system