“old dependency ratio”的概念、定义、翻译、参考文献-科学参考

单词	old dependency ratio
释义	old dependency ratio Encyclopedia 法学年龄释 old dependency ratio老年抚养比人口中老年人数与劳动年龄人数之比，以百分数表示。又称老年抚养系数。
随便看	Atticus Attila Attila József Attilio Bertolucci Attis Theater attitude attitude adjustment attitude and heading reference system attitude-behavior consistency attitude change attitude control attitude control engine attitude control system attitude correction attitude-determination GNSS receiver attitude determination of carrier phase attitude learning attitude level effect attitude maneuver control attitude maneuver for star searching attitude measurement attitude measuring equipment attitude measuring sensor attitude parameter attitude pursuit guidance

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。