“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	ventral platelet ventral plug ventral pouch ventral process ventral rib ventral ridge ventral seta ventral spine ventral sucker ventral suture ventral thalamus ventral trachea ventral valve ventricle ventricle electrical activity ventricle late potential ventricle late potential, VLP ventricular arrhythmia ventricular compliance ventricular fibrillation ventricular filling phase ventricular flutter ventricular function curve ventricular late potential ventricular septal defect

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。