Russian teenagers are risking their lives in a deadly new craze - clinging to the back of Moscow underground trains as they hurtle through darkened tunnels, local media reported.

据当地媒体报道，莫斯科少年最近流行起一种新的疯狂玩法——跳上地铁尾部跟随地铁穿越隧道。

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Metro-2 in Moscow, Russia is a purported secret underground metro system which parallels the public Moscow metro.

俄罗斯莫斯科地铁2是传说中和莫斯科公共地铁并行的地铁系统。

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Moscow Metro-2 Metro-2 in Moscow, Russia is a purported17) secret underground metro system which parallels the public Moscow Metro.

传说俄罗斯莫斯科地铁2号线是一套秘密的地铁系统，与公用的莫斯科地铁线路平行。

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On Monday,two suicide bombings on Moscow's underground train system killed thirty-nine people.

VOA: special.2010.04.03

Moscow's Metro is one of the most-used underground railways in the world, carrying about 5.5 million passengers a day.

BBC: Moscow Metro hit by deadly suicide bombings

In January of this year, the Department of Defense received indications consistent with an underground nuclear test in Russia even though Moscow claims that it has been observing a self-imposed moratorium on nuclear testing.

CENTERFORSECURITYPOLICY: Center for Security Policy | Clinton��s CTB And Other Placebos Won��t Stop, Will Compound The Danger Of Proliferating Weapons Of Mass Destruction