caon

例句：

1. 1. The explorers found a cave with fresh water in it.
   探险者发现了一个里面有淡水的洞穴。
2. 2. The cave was filled with bats and insects.
   这个洞穴里充满了蝙蝠和昆虫。
3. 3. The cave is too dark to see anything clearly.
   这个洞穴太暗了，什么都看不清。