The game calls for players to lift a ball inside a transparent tube using their powers of concentration.

游戏要求玩家利用集中力将一个小球上升至一根透明的管中。

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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。

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You have a tube, a transparent — a tube — a hollow tube, and at the top of the tube you throw a ball through so it whips through the tube and it comes out.

用一根管子，一根透明中空的管子，从管子最上面，你丢进去一个小球，小球迅速穿过管子，飞出来。

youdao

You have a tube, a transparent--a tube--a hollow tube, and at the top of the tube you throw a ball through so it whips through the tube and it comes out.

用一根管子,一根透明中空的管子,从管子最上面,你丢进去一个小球,小球迅速穿过管子,飞出来

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On the right, a floating green energy ball spins in a vertical tube.

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The object of the game is to keep the floating ball in the center of the tube with judicious application of throttle and brake.

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It was a buried metal tube aimed along the irrigation ditch and loaded with explosives, bullets, ball-bearings and spark plugs.

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