rockover

例句：

1. 1.The rockover is a natural barrier that separates the land from the water.
   岩石覆盖物是一个自然屏障，将陆地与水域分隔开来。
2. 2. The rockover is an important source of minerals for mining operations.
   岩石覆盖物是采矿作业的重要矿物来源。
3. 3. The rockover has been eroded by wind and water over millions of years.
   岩石覆盖物经过数百万年的风化和水蚀作用已被侵蚀。