voids and pits

例句：

1. 1. The voids and pits in the wall are filled with sand.
   墙上的空洞和坑洞里填满了沙子。
2. 2. The engineer found a void inthe structure that needed to be filled.
   工程师在结构中发现了一个需要填充的空洞。
3. 3.The pits in the ground were filledwith water after the rain.
   雨水过后，地面的坑洞被水填满了。