scrape the bottom of the barrel

例句：

1. 1. The car was scratched bythe tree branches.
   汽车被树枝刮伤了。
2. 2.He scraped his knee on a rock.
   他在岩石上刮伤了膝盖。
3. 3. Shesqueezed her way through the crowd toget to the front.
   她挤过人群来到前面。