Now formally I could have had this pointing off to another object containing 4, but that just seemed excessive, right?

当然我可以正式的把它指向,另外一个含有4的对象，但这有点多余对不对？

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Even though the graph is going up and down, the object is moving from left to right.

虽然图上曲线是上下波动,但是物体是由左向右移动的

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