speleologist

例句：

1. 1.He is a renowned speleologist who has explored many ancient caves in the area.
   他是一位著名的洞穴学者，曾在该地区探索了许多古老的洞穴。
2. 2. The speleologist discovered a hidden chamber filled with precious artifacts.
   这位洞穴学者发现了一个藏有珍贵文物的隐秘洞穴。
3. 3. The speleologist's research has shed light on the history of the region's prehistoric cave dwellings.
   这位洞穴学者的研究揭示了该地区史前洞穴居住的历史。