缺口

例句：

1. 1. The carhad a big gap in the tire.
   汽车轮胎有一个大的缝隙。
2. 2. There's agap between the bookshelves.
   书架之间有一段距离。
3. 3. The gap between the twocountries is widening.
   两国之间的差距正在扩大。