fall back on

US /fɔːl bæk ɑːn/
UK /fɔːl bæk ɑːn/
"fall back on" picture
1.

依靠, 指望

to use or depend on someone or something when other things have failed

:
If the business fails, we can always fall back on our savings.
如果生意失敗,我們總可以依靠我們的積蓄。
She had to fall back on her emergency skills when the power went out.
停電時,她不得不依靠她的應急技能。