draw the line
US /drɔ ðə laɪn/
UK /drɔ ðə laɪn/
1.
劃清界限, 設定底線
to set a limit on what one is willing to do or accept
:
•
I don't mind helping you, but I draw the line at lending you money.
我不介意幫你，但我劃清界限，不借錢給你。
•
You have to draw the line somewhere, or people will take advantage of you.
你必須在某個地方劃清界限，否則人們會利用你。