Rock cave

• 溶洞

Rock cave的用法和样例：

例句

1. Karst cave probing is a very important task in engineering geophysics.
   摘要在工程地球物理中，溶洞探测是一项非常重要的任务。
2. As a result of continuous water erosion, in the course of time a huge cave was formed.
   由于水的不断侵蚀，日久天长就形成了一个大溶洞。