“middle age”的概念、定义、翻译、参考文献-科学参考

科学参考收录了1248194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。

单词	middle age
释义	middle age 中年
随便看	primary condenser primary console primary consolidation primary consonant primary constant primary constituent primary constriction primary construction primary consumer primary containment primary control primary control circuit primary control element primary control officer primary control point primary control program primary control program (PCP) primary control station primary converter primary coolant primary coolant circuit primary coolant inventory primary coolant pump primary cooler primary cooling system