“age composition”概念、定义、翻译-科学时代

单词	age composition
释义	社会学词汇手册 age composition 年龄构成，年龄组合
随便看	levelling bar levelling charge levelling course levelling machine levelling peg levelling pole levelling process levelling roll levelling survey level loop levelman level map levelmeter level-meter level meter (LM) levelness levelness level net level of a factor level of analysis level of aspiration level of aspiration level of assurance level of compensation level of compensation

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。