One day, physicist Ho-Kei Chan of Trinity College Dublin was playing with steel ball bearings, trying to pack them into a little cylindrical tube in the most efficient way possible.
一天，都柏林大学圣三一学院的物理学家陈和奎正拿着一些铁珠玩耍，试图将他们以最有效的方法装进一个小的圆柱型管子里。
Your game's set of tools includes a moving racket and a ball, but the features are different in each game of the pack.
您的游戏的一套工具，包括一个移动球拍，一个球，但特点不同，在每场比赛的包。
These are used when strong rotation resistance is required (for instance, to cover ball screws) and where a very compact closed pack is required.
当需要强大的反旋转能力（例如保护球形螺丝钉）和当需要非常闭合紧凑的结构时。请全胜这些形式的护罩。
These are used when strong rotation resistance is required (for instance, to cover ball screws) and where a very compact closed pack is required.
当需要强大的反旋转能力（例如保护球形螺丝钉）和当需要非常闭合紧凑的结构时。请全胜这些形式的护罩。
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