“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	central confidence interval central configuration central conflict for a drama central conic Central Conservatory of Music central control room central control system of wind farm cluster central coordinate system central core central curve central cylinder central dark field imaging central dark-field imaging central dark ground method central date central delay Central Department of Propaganda and Agitation of the Central Committee of the CPSU central derivative central diaphragm method central difference central difference; centered difference central difference notation central difference operator central difference quotient central dilation

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