1、Congenital——a birth defect that is not inherited
先天的缺點(diǎn)，并不是因?yàn)?/a>遺傳而獲得的特性。

2、Birth defect is one of the key elements that seriously affect the quality of population.
出生缺陷是影響人口出生質(zhì)量最重要的因素。

3、In the first group birth defect was found in 6 children. Total incidence rate amounts to 76%.
在孕期接觸氯乙烯組中發(fā)現(xiàn)先天性缺陷子女6人，總計(jì)發(fā)生率為76%。

4、Prenatal Screening can be helpful to lower birth defect and improve the quality of the new born.
產(chǎn)前篩查有助于降低缺陷兒出生，提高出生人口質(zhì)量。