研究这两个人口大国在控制人口出生率中扮演的角色将会是很有趣的一件事情。

It would be interesting to examine the role played by the state in these two demographic giants in regulating the birth rate.

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结果表明：妇幼卫生合作项目工作在控制人口出生率，降低5岁以下儿童死亡率，尤其是降低婴儿及新生儿死亡率方面卓有成效。

The results showed that the birth rate and the mortality of children under 5 years old were decreased especially for infants and neonates.

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