With the growth of economic, the population also grows at a certain rate.
随着经济的增长，人口数量也在以一定速度增长。
China has already cut its rate of population growth by about one half since 1970.
自1970年以来，中国的人口增长率大约已经降低了一半。
China has already cut its rate of population growth by about one half since 1970.
自1970年以来，中国的人口增长率大约已经降低了一半。
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