“第二次人口转变”的概念、定义、翻译、参考文献-科学参考

单词	第二次人口转变
释义	第二次人口转变 Encyclopedia 法学人口转变释 second demographic transition第二次人口转变一些发达或较发达国家出现的生育率极低且长时间在低位徘徊、死亡率因人口老龄化缓慢回升、人口自然增长速度极其缓慢甚至负增长、人口净迁移率由负变正的人口变化过程。
随便看	high altitude simulation test of passive ejection of SRM high altitude station High-Altitude Water Cherenkov observatory high-alumina basalt high-alumina brick high alumina cement high ammonia-nitrogen wastewater high amylose corn high anal fistula high and low hair towel high and low pressure heater control system high and low temperature environmental cabinet high and low temperature environmental test high and new industrial development zone of Harbin High and New Technology Industrial Development Zone of Daqing High and New Technology Industrial Development Zone of Qiqihar high and steep slope high-angle annular dark-field image high-angle annular dark-field image, HAADF image high angle-of-attack aerodynamics high angle of attack flight test high angle of attack stability control high-aperture lens high-aperture lens, wide-aperture lens High Art Photography

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。