go without saying
US /ɡoʊ wɪˈðaʊt ˈseɪ.ɪŋ/
UK /ɡoʊ wɪˈðaʊt ˈseɪ.ɪŋ/

1.
不言而喻, 显而易见
to be obvious or generally understood without needing to be stated
:
•
It goes without saying that you should always be polite.
不言而喻,你应该始终保持礼貌。
•
Your dedication to the project goes without saying.
你对项目的奉献不言而喻。