And so when we say something is exponential, we're talking about in terms of the number of bits required to represent it.

所以当我们说某些东西，是指数增长的我们指的,就是代表它的比特数。

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So we can completely describe an orbital with just using three quantum numbers, but we have this fourth quantum number that describes something about the electron that's required for now a complete description of the electron, and that's the idea of spin.

所以我们可以用３个,量子数完全刻画轨道，但我们有这第四个量子数,来完整的,描述电子，这就是自旋的概念。

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