它们也可以用来检查降低儿童死亡率和疾病的努力是否有效。
They can also be used to see whether efforts to reduce child mortality and disease are effective.
她表示近年来努力降低儿童死亡率已经取得巨大的成就。
She said that great strides have been made in recent years in efforts to reduce child mortality.
梅琳达：这也是为什么降低儿童死亡率是我们工作的核心。
Melinda: : This is why reducing childhood mortality is the heart of the work for us.
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