The Aging of the Population
The Aging of the Population（人口老龄化）是指人口生育率降低和人均寿命延长导致的总人口中因年轻人口数量减少、年长人口数量增加而导致的老年人口比例相应增长的动态。
当一个国家或地区60岁以上老年人口占人口总数的10%，或65岁以上老年人口占人口总数的7%，就意味着人口老龄化了。
我们来看2个例句：
How to solve the aging of the population and the problems brought about by in such a developing country is an extremely challenging reality.
如何解决人口老龄化及其所带来的问题在我们这样一个“未富先老”的发展中国家是一个极具挑战性的现实问题。
As the aging process of China's population structure is accelerating, the aging of the population issue has become the focus of attention.
随着我国人口结构老年化进程的加速，人口老龄化问题已经成为全社会关注的焦点。
祝大家顺利拿证~
