“人口年龄结构”概念、定义、翻译-科学时代

单词	人口年龄结构
释义	人口学词汇手册人口年龄结构 age structure
随便看	fire insurance fire insurance fire insurance policy fire insurance premium fire insurance-standard fire policy fire insurance tariff rate fire intensity fire kiln fire legal liability insurance fireless cooker fire limit fire line fire line fire load fire load fire load density firelock fire loss fire loss adjustment fireman fireman fire management fireman apprentice fireman drama fire map

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。