Imagine plugging in the DVD, or whatever it is, with all of the best possible experiences.
想象插入一张光碟,里面储存着所有最好的可能的体验。
All I'm doing here, nothing particularly exciting, I'm simply plugging this expression in for P and then I multiplied the whole thing out because it was all multiplied by q.
这些计算过程确实很枯燥,我只是把这个算式代入到P中,然后打开整理,因为每一项都乘以了q
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