draw the line
US /drɔ ðə laɪn/
UK /drɔ ðə laɪn/
1.
划清界限, 设定底线
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.
我不介意帮你，但我划清界限，不借钱给你。
•
You have to draw the line somewhere, or people will take advantage of you.
你必须在某个地方划清界限，否则人们会利用你。