“人口金字塔”的概念、定义、翻译、参考文献-科学参考

单词	人口金字塔
释义	人口金字塔 Encyclopedia 医学健康统计释 Population pyramid人口金字塔按性别和年龄表示人口分布的一种塔状条形图。
随便看	unlock unlocking unlocking mark left by the original key unlubricated unlubricated friction Unlucky Uncle Lucky in Love unmagnetized unmagnetized plasma unmanned aerial vehicle unmanned aerial vehicle autonomous control unmanned aerial vehicle command and control system unmanned aerial vehicle communication unmanned aerial vehicle coordinated formation control unmanned aerial vehicle flight unmanned aerial vehicle flight test unmanned aerial vehicle logistics unmanned aerial vehicle ocean observation system unmanned aerial vehicle remote sensing unmanned aerial vehicle sense and avoid unmanned aerial vehicles photography unmanned aircraft unmanned aircraft system integrated simulation unmanned combat system unmanned detection system unmanned factory

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。