Let me simply tell you that in time I am going to show you that this formula is inconsistent with the Bohr model.

让我说简单点吧,之后我会向你演示,这个方程式与波尔模型不一致。

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But there's another way to do this and I'm going to give you now the simplest example of the other way, which is to draw free-body diagrams.

不过还有另外一种方法,现在我来给你们演示,另外一种方法最简单的例子,也就是隔离法的受力分析

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