toup

例句：

1. 1. The mountainis at its toup at the topof the valley.
   这座山在山谷的顶端。
2. 2. The toup of the building isvisible from the street.
   从街道上可以看到建筑的顶部。
3. 3. The toup of thetree is covered in snow.
   这棵树的顶部被雪覆盖了。