英语词汇“proportion of old population”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	proportion of old population
释义	proportion of old population 基本例句 n.老龄人口比重 China's population continues to grow,the proportion of the aged is getting larger,and the pressure on employment and social security is mounting.人口总量继续增加，老龄人口比重上升，就业和社会保障压力增大。
随便看	Coal meal coal measure coal-measure coal-measure facies coal measure gas coal-measure gas coal measure Kaolinite coal-measure pyrite coalmeasures coal measures coal-measures coal measures and red beds coal measures depositional environment coal-measures kaolin Coal-measures kaolin coal measures kaolinite coal measure soil Coal measure source rock coal-measure source rock coal measures plant Coal measures rocks coal measures sourcerock coal-measures source rock coal measures strata coal measure strata