充沛的写作词汇储备能让你的雅思作文更加出彩。新东方在线雅思频道为大家收集了雅思写作常用词汇：自控/出生率，供大家学习参考。

　　birth rate[出生率]/fertility rate

　　-eg: Currently the birth rate is decreasing so that families are smaller with fewer children.;

　　self-control[自控]/self-restrict

　　-eg: When they get to school age, children start learning self-control and discipline.