fall back on　 英 [fɔːl bæk ɒn]　 美 [fɔːl bæk ɑːn]

基本释义

求助于； 转而依靠

例句

Doctors sometimes fall back on old cures.

有时医生们求助于老的疗法。

She was obliged to throw herself on her uncle for aid.

她不得不不求助于她的叔叔。