地下的英文：
underground
subterranean

An underground nuclear test
地下核试验

Underground Transmission
地下输电

Geologists uncovered hidden riches.
地质学家发现了地下的宝藏。

The ground is covered with snow.
地下尽是雪。

The peanut develops below the ground.
花生在地下结果。

The cabbages were stored in the basement.
包心菜储藏在地下室里。

The seed sleeps in the ground all winter.
整个冬天种子都在地下休眠。

Too hasty a generalisation would have misled us
如果十分仓促地下判断，将使我们误入歧途。

We take shelter in the hotel cellar when the civil war starts .
内战开始时，我们躲到了饭店的地下室里。

A diplomat is someone who can tell you to go to hell and make you feel happy to be on your way.
"外交官是这样一种人,他能让你愉快地下地狱。"

There's an underground of dissident intellectuals.
有反对派知识分子的地下组织。

Miners work underground.
矿工在地下工作。

They were making a plan underground.
他们在秘密地策划。

The cavers discovered a vast underground chamber.
探穴人发现了一个地下大洞穴。

Earthquakes take place far underground.
地震则发生在地球的极深处。

A subterranean passage,river,tunnel
地下通道、河流、隧道

Drift in silence in the dark on the subterranean lake and gaze up at the spectacular living lightshow
在黑暗的地下湖中静静地漂流,你会为生动而五光十色的景观所吸引。

In the cave is a subterranean river on which one can sail by boat to the extremity of the cave
洞中，有一条阴河水，可乘船直通岩底深处。

Subterranean fires and deep unrest disturb the whole area(Rachel Carson)
暗中的破坏和激烈的动荡使得整个地区陷于不安(雷切尔·卡森)

But closure of this one subterranean channel into the U.S. semi-conductor industry troubled the Soviets only slightly
但是，这条通向美国半导体工业的秘密渠道的关闭，并没有使苏联人受到多大的影响。