hollow space

例句：

1. 1.The void in the room made me feel uneasy.
   房间中的空洞让我感到不安。
2. 2.The hollow tree was a symbol of hope for many people.
   空心树是许多人希望的象征。
3. 3.The hollow sound echoed through the cave.
   空洞的声音在洞穴中回荡。