backing out

动词 back out:

1. move out of a space backwards
   同义词：back out
2. make a retreat from an earlier commitment or activity
   同义词：retreat, pull back, back out, back away, crawfish, crawfish out, pull in one's horns, withdraw

1. He paid it back out of his earning.
   他用挣的钱把它偿还了。
2. He put his back out badly, falling down the stairs like that.
   他那样从楼梯上跌了下来，使背椎骨严重错位。