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

1.
不言而喻, 顯而易見
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,你應該始終保持禮貌。
•
Your dedication to the project goes without saying.
你對專案的奉獻不言而喻。