So I can write down that the work that gravity is doing in going from a to B, that work is clearly negative.

那么从点a到点B之间，重力所做的功，很明显是负值。

youdao

And again, if we write out what all the terms are, we again have 1 s a squared plus 1 s b squared, but now what we're doing is we're actually subtracting the interference term.

同样，如果我们把所有的项都写出来，同样我们有1s平方加上1sb平方，先现在我们做的是,我们要减去干涉项。

youdao

B So when you get a B from us, B B because it meant you were doing good work and it's not easy to do good work in philosophy.

，And，so，you，should，be，pleased，to，get，a，B，因为你做的好啊,而且在哲学课上做到好可不容易。

youdao

A-Are we doing that? B-No.

我们现在这么做了吗。

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What sort of A-B testing are they doing though?

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