fall back

名词 fall back:

1. to break off a military action with an enemy
   同义词：disengagement, fallback, pullout

动词 fall back:

1. fall backwards and down
2. hang (back) or fall (behind) in movement, progress, development, etc.
   同义词：lag, dawdle, fall behind
3. move back and away from
   同义词：recede, retire
4. retreat
   同义词：lose, drop off, fall behind, recede
5. have recourse to
   同义词：resort, recur
6. go back to bad behavior
   同义词：relapse, lapse, recidivate, regress, retrogress

1. She's completely homeless at least I have my parents to fall back on.
   她是真正无家可归--我至少有父母可依靠。
2. It's always useful to have something to fall back on.
   有点依靠的东西总是有用的。
3. At least we can fall back on candles if the electricity fails.
   停电时我们至少可以使用蜡烛。
4. The enemy fell back as our troops advanced.
   我军前进，敌军後退。