One child was mentally retarded.

一个孩子是迟钝的。

youdao

He was so slow that many thought him mentally retarded.

他迟钝得很，许多人以为他智力低下。

youdao

Hill also has claimed he should not be executed since he is mentally retarded.

希尔声称，他不该被判死刑，因为他智力迟钝。

youdao

Mrs.Shriver also opened a summer camp that was free of cost for mentally retarded children.

VOA: special.2009.08.23

But what she will be remembered for most is her activism that grew out of the struggles of her mentally retarded sister,Rosemary, who died four years ago.

VOA: special.2009.08.15

Her older sister, Rosemary Kennedy, was born mentally retarded.

VOA: special.2009.08.23

If Mr Ellis's bill passes, it will commute all death sentences already passed on mentally retarded prisoners.

ECONOMIST: Death penalty

According to one opinion poll, although 81% of Texans support capital punishment, 73% oppose the execution of the mentally retarded.

ECONOMIST: Death penalty

Q. tests are used to diagnose people as mentally retarded, with a score of 70 generally taken to be the cutoff.

NEWYORKER: None of the Above