The nation's infant mortality rate has reached a record low.

该国的婴儿死亡率已达历史最低。

《柯林斯英汉双解大词典》

In ancient times infant mortality was extremely high.

在古代婴儿死亡率极高。

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Infant mortality is still very high in some countries.

有些国家婴儿死亡率仍很高。

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Epidemiology of Infant Mortality II: Person, Place, and Time.

婴儿死亡的流行病学(二)：人，地，时。

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Epidemiology of Infant Mortality II: Person, Place, and Time.

婴儿死亡的流行病学(二)：人，地，时。

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