SUP

例句：

1. 1. She decided to sleep in the top bunk last night.
   她决定昨晚睡在上铺。
2. 2. The boy was sleeping on the top bunk of his bed.
   那个男孩在他的床上睡在上铺。
3. 3. He climbed up to the top bunk and looked out the window.
   他爬上去到上铺，看着窗外。