the done thing
US /ðə dʌn θɪŋ/
UK /ðə dʌn θɪŋ/

1.
得體的做法, 應做之事
socially acceptable or expected behavior
:
•
It's not the done thing to wear jeans to a formal dinner.
在正式晚宴上穿牛仔褲不是得體的做法。
•
He always knows exactly what the done thing is in any social situation.
他總是清楚在任何社交場合中什麼是得體的做法。