And I'll just point out here also, this is a conversion factor you'll use quite frequently -- many of you, quite on accident, will memorize it as you use it over and over again.

你们会经常用到，所以你们可能,会不小心记住它的值，但我们并不会在,任何考试中。

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That will lead me to use a technique I mentioned again last time, called memoization.

这就使得我要是,用我上次提过的一种技术，也就是默记法。

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