结论遗传性智力迟缓是由DNA损伤引起的人类表型缺陷；

Conclusion:The genetic mental retardation is the human phenotype blemish caused by injured DNA.

youdao

两兄弟，其中一个智力发育迟缓，他们想抢劫。

There were two brothers, one of them retarded, and they get into a robbery.

youdao

露西在智力方面发育十分迟缓，至今还不识字。

Lucy is very retarded and can't read yet.

youdao

露西在智力方面发育十分迟缓，至今还不识字。

Lucy is very retarded and can't read yet.

youdao