So we can play a final little game here by thinking about having somebody sitting in a room planning to reach up into the left.
这样,我们最后来做一个小游戏,大家想象有人坐在房间里,想要够到左边。
This is a little game--and again, don't be overwhelmed by the complexity.
这是一个小游戏,不要被它的复杂性搞晕。
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