There is an underground room in the old house.

在老房子里有一个地下室。

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He built an underground room where he could practice without interruptions and not disturb other people.

他建了个地下室，在那里练习可以不受打扰，也不会打扰其他人。

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It is important that this underground room be kept dark. Light can cause potatoes to develop a poison called solanine.

但保持这个地下室阴暗是非常重要的，因为光会导致马铃薯产生一种茄碱的毒素。

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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

The Big Room is the single largest underground chamber ever found in North America.

VOA: special.2009.12.07

Dorner, 33, had several weapons including an assault rifle, said police Chief Charlie Beck, who urged him to surrender at a press conference held amid heightened security in an underground room at police headquarters.

NPR: Massive Manhunt On For Ex-Cop Accused Of Killing 3

Thamrin Sihite, director general of minerals and coal at the Indonesian energy ministry, said workers were in the underground training room when the roof collapsed, caving in most of the room.

WSJ: Indonesian Mine Death Toll Rises, Miners Still Trapped

The endless layout includes more than 50 bedrooms, a series of intimate drawing rooms and a regally appointed dining room with an underground passage to a separate kitchen building.

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