山洞的英文怎么说

山洞的英语是 "cave"。

来源：这个词源自古英语单词 "caf"，它最早可以追溯到公元5世纪。

例句:

The cave system was vast and complex.
(这个山洞系统巨大而复杂。)
The bats flew out of the cave at dusk.
(蝙蝠在黄昏时分从山洞里飞出。)
The cave paintings were estimated to be over 5000 years old.
(这些山洞壁画估计有5000多年历史。)