“child aged ratio”的概念、定义、翻译、参考文献-科学参考

单词	child aged ratio
释义	child aged ratio Encyclopedia 法学年龄释 child aged ratio老少比总人口中老年人口数与少儿人口数之比。一般以百分数表示。
随便看	rotating variable rotating wave approximation rotating wave-plate rotating wheel multi-detector analyzer rotation rotation about an axis rotation about a point rotational rotational alignment rotational angular velocity of the earth rotational aperture synthesis rotational axis precession rotational band rotational barrier rotational broadening rotational catalysis rotational characteristic temperature rotational constant rotational contour rotational coordinate rotational correlation time rotational cropping rotational degree of freedom rotational diffusion rotational eigenfunction

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。