Police busted an underground network of illegal sports gambling.

警察突袭了一个非法体育赌博的地下网络。

《柯林斯英汉双解大词典》

An underground organization has claimed responsibility for the bomb explosion.

一个地下组织已声称对炸弹爆炸事件负责。

《柯林斯英汉双解大词典》

The escaped prisoners were eventually trapped in an underground garage and recaptured.

越狱逃犯终于给追逼到地下汽车库，再次被捕。

《牛津词典》

Experts say the best place to be is in an underground shelter, or a small,windowless room in the lowest part of a building.

VOA: special.2010.05.11

and there's an underground area

我们还有一部分地下的区域，

布朗的学生们 - SpeakingMax英语口语达人

What we don't get here is a sense of whether there really is an alternate secret postal system that serves a sort of underground of private networks.

在这里我们所不明白的是，是否真的存在一个,提供地下的,私密的通信服务的，秘密邮政系统。

耶鲁公开课 - 1945年后的美国小说课程节选

An underground activist group called Sokwanele has an anonymous blog that 1, 420 other sites link to.

FORBES: Anonymity & the Net

It will include relaxation, group discussions, an underground river and plenty of group meals.

FORBES: Connect

Fifteen years have now elapsed since the United States last conducted an underground U.S. nuclear test.

CENTERFORSECURITYPOLICY: The ��Genie-stuffers��