to fall back的用法和樣例：
例句
- Even if he is not successful as a singer, he has his training as a teacher to fall back on.
即使作為一個歌手不成功，但他受過師資培訓，還可以退而求其次。 - Aside from his meager savings, he has no resources to fall back on.
除了極少量的積蓄外，他沒有可以依賴的財源。 - She's completely homeless at least I have my parents to fall back on.
她是真正無家可歸--我至少有父母可依靠。 - It's always useful to have something to fall back on.
有點依靠的東西總是有用的。
