- It means you're not stupid.
说明你还不傻 - You've had this since dawn?
这封信凌晨就到了 - He sent it to me, not you.
收信人是我,不是你 - I've only shown it to you as a courtesy.
我只是出于礼貌请你过目 - A courtesy?!
出于礼貌 - My husband has been taken prisoner.
我丈夫沦为阶下囚 - My son intends to declare war.
我儿子意欲起兵宣战