cavern

n.

大山洞；凹处；

v.

挖空；置…于山洞中；

复数：caverns

1. The girl lost her way in the cavern.
   女孩在大洞穴中迷了路。
2. 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。

A brief history of salt cavern use
Cavern roof stability - Mechanism of arching and stabilization by rockbolting
Aspects of a Population Study of Cavern-Dwelling Bats
Designing drilling pattern for excavating rock cavern
Latest technology of underground rock cavern excavation in Japan
Age and origin of carlsbad cavern and related caves from 40Ar/39Ar of alunite
Rock dynamics research related to cavern development for Ammunition storage
CAVERN : A Distributed Architecture for Supporting Scalable Persistence and Interoperability in Collaborative Virtual Environment
Some Aspects of Habitat Selection and Other Behavior of Cavern-Dwelling Bats
Winter Activity of Brazilian Free-Tailed Bats (Tadarida brasiliensis) at Carlsbad Cavern, New Mexico