{求助}不懂说就不要说 yao 要怎么翻译

都不对......... 兄弟你不是在娱乐大伙吧...

建议:

Keep silent if you don't know what to say.

If you don't know, keep silent.
If you know nothing, then shut up!(语气太强烈了点儿）

老兄语法错误哦！ 有如下：

If you don't know how to say,just keep your mouth shut!

Don't speak a word if you know nothing.