Yì / tāi / zhì / céng / jīng / shì / Zhōng / guó / rén / kǒu / zhèng / cè / zhōng / de / zhòng / yào / nèi / róng

一胎制曾经是中国人口政策中的重要内容。

The one-child policy was once an important part of China's population policy.