1.
An animal's hollowed-out habitation, such as a burrow.
洞穴动物中空的洞穴，如地洞
2.
The death of the speleologist is due to the infall of the cave.
这位洞穴学家之死是由于地洞的塌陷。
3.
To live or hide in such a place.
在洞中躲藏或生活生活或躲藏在地洞或地道里
4.
An area where rabbits live in burrows.
兔居地免子生活于地洞里的某一区域
5.
underground passages, caves, etc
地下通道、 洞穴等
6.
A natural or artificial hole or cavity in the ground.
坑，洞一个地上天然的或人工的洞或穴
7.
The cat scratched a hole in the ground.
猫在地上扒了一个洞。
8.
A well is a hole in the ground.
井是地面上的一个洞。
9.
I dug a hole in the ground to plant the tree.
我在地上挖一个洞种树。
10.
Moles dug tunnels under the lawn.
?鼠在草地下面打洞.
11.
The ball trickled into the hole.
那球慢慢地滚进洞内.
12.
The socks were worn through in places.
袜子有好些地方穿了洞。
13.
stability of rock mass and soil mass surroundingunderground excavation
地下洞室围岩（土）稳定性
14.
deformation of surrounding rock for underground excavation
岩质地下洞室围岩变形
15.
That is actually a cavity in the earth.
那其实是一个地下洞穴。
16.
A mole burrows its way through the ground.
鼹鼠会在地下钻洞前进。
17.
a dank cellar, cave, etc
阴湿的地窖、 洞穴等.
18.
A pit dug into the ground or on a hillside and used as a shelter.
防空洞挖在地下或山坡，用作掩蔽体的洞