cavern/ˈkævən/

1.noun[c] 

(大而黑的)封闭空间,(大而黑的)洞

He yawned, his mouth opening like a great, red cavern.
他打了个哈欠,嘴巴张开,像一个巨大的红色洞口。
His eyes were dark caverns.
他目光深邃。
2.noun[c] 

山洞,洞穴

They explored the large cavern at the base of this cliff.
他们勘探了这个悬崖底部的大洞穴。
3.vt.

将……掏空,将……挖空

Transportation is carried out in large caverned tanks.
运输工具从这些巨大的洞窟状的坦克里开出来。