“young population”的概念、定义、翻译、参考文献-科学参考

单词	young population
释义	young population Encyclopedia 法学年轻型人口释 young population年轻型人口 0～14岁的人口数量占总人口数量40%以上，65岁及以上人口数量低于总人口数量4%的人口年龄结构。
随便看	launching angle launching canister launching ground launching machine launching position launching procedure launching service support launching speed launching vehicle launch mode launch on warning launch pad launchprogram launch region launchsite rehearsal launch/takeoff coordinate system launch technological process launch technology launch vehicle launch vehicle digital assembling launch vehicle digital simulation launch vehicle telemetry launch window laundry beads laundry care agent

科学参考收录了854744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。