c We know it's very specific for light because in this equation is c, the speed of light. So any time you go to use this equation, if you're trying to use it for an electron, just ask yourself first, does an electron travel at the speed of light?

我们知道它只对光适用是因为在这个方程里有,光速，所以下次你们用这个方程前，如果你们要把它用到一个电子上，先问问你自己，电子的运动速度是光速吗？

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The first question you need to ask yourself is why do you want, or why are you thinking about taking this course?

各位需要问自己的第一个问题是，为什么要，为什么想研读这门课程？

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People tend not to realize that the first question you should always ask yourself, is this really just something that's well-known in disguise?

已解决问题呢？,这是一个最短路径问题吗？,这是一个最近邻居问题吗？

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Ask yourself, first of all, what the developing countries, gathered in Seattle, thought of this.

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First, ask yourself this question: Why are you investing?

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You also have to ask yourself if you even need an app in the first place.

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