Daily supplementation with folic acid for 1 month prior to conception and during pregnancy may reduce the incidence of neural tube defects such as spina bifida and anencephaly in the child.
在怀孕前一个月及怀孕过程中对叶酸的补充会减低胎儿患神经系统疾病的机率，例如脊柱裂和脑血管畸型。
Based on prior researches, and concerning the relationship between time and language, this paper makes a comment on conception of time in Saussure sA Course in General Linguistics.
本文在前人研究成果的基础之上，结合时间和语言研究的关系，评述索绪尔《普通语言学教程》的时间观。
Based on prior researches, and concerning the relationship between time and language, this paper makes a comment on conception of time in Saussure sA Course in General Linguistics.
本文在前人研究成果的基础之上，结合时间和语言研究的关系，评述索绪尔《普通语言学教程》的时间观。
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