“职业人口”概念、定义、翻译-科学时代

单词	职业人口
释义	人口学词汇手册职业人口 active population
随便看	photoneutron source photon excitation photon excitation X-ray fluorescence analysis photon-excited X-ray fluorescence analysis photon flux photon free length photon funnel photonic crystal photonics photonics photonics photon-induced photon intensity photon logging photon noise photonovel photonovel photon rocket photon shower photon structure photon theory photon transition photonuclear activation analysis photonuclear effect photonuclear excitation

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。