Now, the purpose of this exercise is to give you a little bit of practice in figuring out what these quantities are.

就有这样的结论,这个练习的作用时让你们理解,这些物理量是什么。

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And by the exercise of entire sovereignty in protecting the public teaching of it, convert this truth of speculation " into the utility of practice."

藉由在整个统治区域,保护传授者的实践，将这对真理的思索,转换为实用与实践“

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