论文部分内容阅读
先天智能发育不全(mental retardation,MR)是一种发生率较高、病因复杂、危害极大的病征。深入研究并予以预防是当前人类优生学的重要课题。
The mental retardation (MR) is a symptom of high incidence, complicated etiology and great harm. In-depth study and prevention is an important issue of current human eugenics.