公共场合不要说脏话。此外还有

Say dirty words at public.

他们厌恶彼此，想杀了对方或是他们之间出现了问题——不要说脏话，因为这会使事情升级成暴力。

They hate each other, they want to kill each other or there's a problem - don't use bad words because, again, that escalates into violence.