出生缺陷的病因学研究是有效预防出生缺陷的基础和关键。

Research on the causes of birth defects is fundamental to prevent it.

youdao

出生缺陷的病因学研究是有效预防出生缺陷的基础和关键。

Research on the causes of birth defects is fundamental to prevent it.

youdao