In this article, non-central collision, superball and Newton′s cradle are analyzed with the virtual experiment which is a useful way of collision′s analyzing and teaching.

利用物理仿真实验室软件对非对心碰撞、超弹性碰撞、牛顿摆等碰撞实验进行了模拟和分析，为碰撞问题的研究和教学提供了有效的方法。

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Genesis hypotheses include a galaxy collision billions of years ago and the gravitational effect of a central bar that has since vanished.

对于这个星系起源有几种假设，其中包括数十亿年前的一次星系撞击以及重力对中间消失地带的影响。

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Rho meson gets quite much attention and is expected to carry information about the central fireball formed in the heavy ion collision, because its lifetime is shorter than that of the fireball.

介子由于其寿命小于碰撞中心区火球的寿命，可能反映高能重离子碰撞中心区的物质形态信息而被寄予厚望，受到广泛关注。

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This set him on a collision course with the central government, which says the Spanish constitution does not provide for secession.

BBC: Catalonia profile

Six British crew members and one American were killed Saturday in a midair collision between two British Navy Sea King helicopters over the Persian Gulf, according to the UK Central Command in Qatar and the Pentagon.

CNN: Pilots dead after Patriot accident