美国科学60秒 SSS 2013-03-27_在线英语听力室_免费在线英语听力学习网站

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　　A heavy metal concert might be a tough place to think about physics.especially at the marsh¹ pit while some audience members were dancing violently.But the marsh pit itself actually is interesting place to find physics and actions.and not just four sequence math times excelleration.Merdon,a quantum researcher,analyzed vedio of marsh pit ,and match the motions of participantces.they found that the collision of marshers were similar to motion of moleculars in ideal gas.marsher answered can also formed what is called a circle pit,but they run collectively in a rain creating a vore test parten.

　　The scientists not only model marsh's circle pit ,they also found how one type of motiion transition into another. they present their ongoing² working at the American Physical Society marsh meeting.but why bother to look at a marsh pit at the first place?

　　the physicst think their research may also apply other stream situatiions which could help us understand collective human movement in panics and riots.so I say rock on!

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1 marsh
n.沼泽，湿地
参考例句：
There are a lot of frogs in the marsh.沼泽里有许多青蛙。 I made my way slowly out of the marsh.我缓慢地走出这片沼泽地。

2 ongoing
adj.进行中的，前进的
参考例句：
The problem is ongoing.这个问题尚未解决。 The issues raised in the report relate directly to Age Concern's ongoing work in this area.报告中提出的问题与“关心老人”组织在这方面正在做的工作有直接的关系。