【雅思词汇】老龄社会:

计划生育:family planning;低出生率:low birth rate;空巢综合症:empty nest syndrome;孝顺:filial piety;孝子:dutiful son;长寿:longevity;老年人:senior citizens/the elderly;退休:retirement;退休金:pension;养老保险:endowment insurance;老龄化社会:aging society