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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》
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If human embryo is person, why we never count these into infant mortality rate?
如果人胚胎是人，为什么我们从不将它们计算在婴儿死亡率内？
youdao
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If human embryo is person, why we never count these into infant mortality rate?
如果人胚胎是人，为什么我们从不将它们计算在婴儿死亡率内？
youdao