fall back

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

撤退, 後退

to retreat or move back

:
The troops were ordered to fall back to a more defensible position.
部隊被命令撤退到更易防守的位置。
When the enemy advanced, our soldiers had to fall back.
當敵人進攻時,我們的士兵不得不撤退
2.

依靠, 求助於

to rely on someone or something for support or help when in difficulty

:
If things go wrong, we can always fall back on our savings.
如果出了問題,我們總可以依靠我們的積蓄。
She had to fall back on her emergency skills during the crisis.
在危機中,她不得不依靠她的應急技能。