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Prenatal and postnatal PbB levels and their effects on infant growth were analysed.
分析出生前后铅暴露水平对婴幼儿体格发育的影响.
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We should improve prenatal and postnatal care and foster physical fitness among the population.
我们要加强优生优育工作,通过人口素质.
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。