high level cave

例句：

1. 1. The high-level cave is apopular tourist attraction.
   这个高级别的洞穴是一个受欢迎的旅游景点。
2. 2. The high-level cave is hometo many rare species of plants and animals.
   这个高级别的洞穴是许多稀有植物和动物的家园。
3. 3. The high-level cavehas been unexplored for decades, and its secrets remain a mystery.
   这个高级别的洞穴几十年来一直未被探索，其秘密仍然是一个谜。