“留守老人”的概念、定义、翻译、参考文献-科学参考

单词	留守老人
释义	留守老人 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	radio frequency identification, RFID radio frequency identification(RFID)technology radio frequency identification tag Radio frequency identification technology radio-frequency identification technology radio-frequency identification technology, RFID technology radio frequency identification，RFID radio frequency integrated circuit radio frequency interference radio-frequency interference radio frequency ion thruster radio-frequency leakage radio-frequency line radio-frequency mass spectrometer radio frequency MEMS radio frequency metrology radio frequency micro-electromechanical system filter radio frequency micro-electromechanical system mixer radio frequency micro-electromechanical system switch radio frequency module radio frequency navigation radio-frequency oscillator radio frequency plasma radio-frequency plasma radio frequency quadrupole linear accelerator

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。