Baby大太阳
人口老龄化aging of population；aged tendency of population更多释义>>[网络短语]人口老龄化 aging of population;an aging population;population aging美国人口老龄化 Aging of the American Population人口老龄化趋势 aged trend;aging population trend;population-aging trends in shaanxi
koko乔纳
老龄化 aging (population)老龄化问题区域技术会议 Regional Technical Meeting on Aging 世卫组织全球老龄化与成人健康研究 Study on Global Ageing and Adult Health
优质英语培训问答知识库
