mentally handicapped
adjective/ˌmentəli ˈhændikæpt/
/ˌmentəli ˈhændikæpt/
(old-fashioned, offensive)- having difficulty learning or understanding things because of a brain condition
This term is now considered offensive. You can say that somebody has learning difficulties or has a learning disability instead.由于大脑状况而难以学习或理解事物