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Birth defect is one of the key elements that seriously affect the quality of population.
出生缺陷是影响人口出生质量最重要的因素。
youdao
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Objective:To improve the health of the people, reduce the birth defect.
提高人口素质，减少出生缺陷。
youdao
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Objective:To improve the health of the people, reduce the birth defect.
提高人口素质，减少出生缺陷。
youdao