“left-behind elderly”的概念、定义、翻译、参考文献-科学参考

单词	left-behind elderly
释义	left-behind elderly Encyclopedia 法学老年社会问题释 left-behind elderly留守老人因子女离开而留在原家庭中的老年人。根据中国对人口迁移流动的定义，严格意义上的留守老人指因子女离开（跨越县级以上行政区）半年及以上而留守在家的老年人。
随便看	frequency distribution curve frequency distribution table frequency diversity and combining frequency divider frequency dividing network frequency division duplex-long term evolution, FDD-LTE frequency division multiple access frequency division multiple access, FDMA frequency division multiplex communication frequency division multiplexing frequency division multiplexing, FDM frequency division multiplexing，FDM frequency domain frequency domain airborne electromagnetic method frequency domain analysis frequency-domain analysis frequency domain analysis of dynamic circuits frequency domain electromagnetic method frequency-domain electromagnetic sounding with electrical dipole source frequency-domain electromagnetic sounding with magnetic dipole source frequency domain filtering frequency-domain filtering frequency domain ground-airborne electromagnetic instrument frequency domain helicopter airborne electromagnetic system frequency domain identification

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