truism

US /ˈtruː.ɪ.zəm/
UK /ˈtruː.ɪ.zəm/
"truism" picture
1.

老生常談, 自明之理

a statement that is obviously true and says nothing new or interesting

:
It's a truism that you can't please all the people all the time.
“你不可能一直取悅所有人”是一個老生常談
His speech was full of empty truisms.
他的演講充滿了空洞的老生常談