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	sediment transport rate, sediment discharge sediment transport through pipeline sediment-transport water sediment transverse transport sedimenttrap sediment trap sediment trap gully sediment trapper sediment-trapping dam sediment traps sediment traps gully sediment treatment sedimenttube sediment tube sediment tubes Sediment type Sediment types sedimentum sedimentum lateritium sediment upturning sediment urinalysis sediment vein sediment velocimeter sediment velocity sediment volume partitioning