life expectancy 预期寿命
live longer 寿命变长
the population grows older 人口老化
people of retirement age 退休老人
be eligible to receive a pension 有资格领退休金
young adults 年轻人
working adults 工作年龄的人（和退休老人对比）
receive less money in taxes 税收减少
an aging population 逐渐老龄化的人口
a greater tax burden 逐渐增大的税务/税收负担
a rise in the demand for healthcare 医疗需求增长
look after elderly relatives 照顾老龄亲属
increase the retirement age 提高退休年龄
a productive working life 高产的工作生活
encourage immigration 鼓励移民
increase the number of working adults 增加工作人口数量
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