We can thank improved literacy, which has played a role in spreading vital knowledge in low-income societies, for some of these health gains.
部分健康成果应归功于读写能力的提高，因为这对低收入社会里传播重要知识起到了举足轻重的作用。
We can thank improved literacy, which has played a role in spreading vital knowledge in low-income societies, for some of these health gains.
部分健康成果应归功于读写能力的提高，因为这对低收入社会里传播重要知识起到了举足轻重的作用。
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