All of us can pack a healthy lunch for our son, or go outside and play ball with our daughter.
我们都能为儿子收拾干净的午餐，或外出与女儿一起玩球。
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。
All of us can pack a healthy lunch for our son, or go outside and play ball with our daughter.
我们都能为儿子准备健康的午餐，或与女儿一起外出打球。
All of us can pack a healthy lunch for our son or go outside and play ball with our daughter.
我们都能为儿子准备健康的午餐，或与女儿一起外出打球。
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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