"If indeed we find some features in the CMB which are well fitted by a collision but are hard to explain otherwise, this would be a tremendously important development," he says.

“如果我们确实发现了些由碰撞产生的背景微波辐射特征，尽管这仍然很难给予解释，但它已经是个巨大且重要的进展。”他说道。

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But a cold hard physics fact is that something hurting though space at 18,000 miles a second could be torn up by a collision with the tiniest speck of dust imaginable.

但是一个更冷酷的物理事实是，以每秒18000英里的速度穿越太空，哪怕是能想到的最微小的尘埃，被它一碰都可能将航空器撕个粉碎。

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Observations of a distant galaxy cluster collision reveal a core of invisible matter devoid of glittering galaxies-something that is hard to explain by current theories.

对遥远的星系团碰撞进行观察后，发现了一个不可见物质的核心，然而其中没有星光闪烁的星系，这用目前的理论是难以解释的。

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Kennedy remembers the first time he turned over in his chair after a hard collision with another player.

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He was hurt in a hard collision with the outfield wall a week earlier at Dodger Stadium that also caused him to need 11 stitches on his chin.

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The net effect will be to jerk the easy-money football away from Airline Charlie and produce a painful collision between his backside and the hard ground of economic reality.

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