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。
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。
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。
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