很少知道的英语短语

其实这是 ban sb from doing的简写，把from省略了，例句如下
He was banned from attending the meeting

ban students from reading dirty books
禁止学生阅读猥亵的 [色情] 书刊

ban the young from bloody shows
禁止年青人看残忍好杀的演出

是省略了from

School bans students smoking.
My mother bans me watching TV

ban sb. from doing sth.
意思是禁止某人做某事
His father banned him from staying out late.