The point of this exercise is not to practice your usage of the pencil or how to move your hand.
这个练习的精髓在于：不是在练习怎样用你手中的笔，或者怎样动你的手。
In this way Purify ACTS like vitamins or exercise: it's something you can use every day to keep your code healthy and keep a lid on problems so they don't get out of hand.
这样看来，Purify就像维他命或者锻炼：您可以每天使用来保持您代码的健康，这样一来这些问题就可以掌控之中。
You can vary this exercise by stretching first one leg, then the other, or by moving your hand positions from side to side.
你可以先拉伸一条腿，然后换另外一条腿，或者将手从一边移动到另外一边。
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