“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	distributed object distributed operating system distributed optical fiber measurement technology distributed optical fiber strain tester distributed optical fiber temperature tester distributed optical fiber vibration tester distributed optimization distributed parameter distributed parameter circuit distributed parameter control system distributed parameter system distributed parameter system stability distributed parameter vibration system distributed power train electric drive system distributed problem solving distributed processing distributed processing system distributed programming distributed propulsion system distributed PV power generation system distributed quantum computation distributed radar distributed random variable distributed refresh distributed retrieval

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