mentally defective meaning in English

心智不健全

Sam's grandson is mentally defective and has limbs that won't function-a vegetable like all the others .
萨姆的外孙大脑受损，四肢不能正常活动，和那些孩子一样是个畸型儿。
He is mentally defective
他智力不健全。
A 22 - year - old mentally defective female presented with several localized long hairs on the superior area of the anterior side of her neck for several months
摘要一位22岁智障女性，数月之前在颈部前上部位出现数根长毛。