教学“弱智化”倾向出现了。的翻译：The teaching of "mental handicap" tendency emerged. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Teaching "mentally handicapped" tendency appeared.

The teaching of "mental handicap" tendency emerged.

The teaching “retarded” the tendency appeared.

Teaching "mentally handicapped' trend has emerged.

The teaching of "mental handicap" tendency emerged.