empty by gravity

例句：

1. 1. The room was empty except for the bookshelf.
   除了书架，房间是空的。
2. 2. He felt empty after losing his job.
   失去工作后，他感到空虚。
3. 3. She emptied the cupboard of all its contents.
   她把柜子里的所有东西都清空了。