Once you've got that, you can do minus 7 times a vector Just take the vector, multiply it by Pi and flip it over.

明白这点之后,你就可以计算-7乘以矢量,只需用 π 去乘以那个矢量,然后将其方向调转

耶鲁公开课 - 基础物理课程节选

You all flip it.

你们都把硬币抛起来。

耶鲁公开课 - 心理学导论课程节选

So what we're going to do is we're going to figure out Player 1's best response quantity to each possible choice of Player 2, and then we're going to flip it around and figure out Player 2's best response quantity to each possible choice of Player 1, and then we're going to see where those coincide, where they cross.

下面我们就需要表示出,参与人1对于2不同产量下的最佳产量,然后反过来写出,在参与人1的不同产量下,参与人2的最佳产量,然后再来看看这两者在哪里相交

耶鲁公开课 - 博弈论课程节选

So we can kind of flip it this way this will be one pi bond, this will be another interacting between these p orbitals.

我们可以把它这样翻一下,这是一个π键，这是另外一个p轨道之间,相互作用的π键。

麻省理工公开课 - 化学原理课程节选

If you flip the Periodic Table over you will have the ionization energy of sodium, first ionization energy, 5eV and it is about 5 eV which, when you convert, 496kJ/mol is a whopping 496 kilojoules per mole.

如果浏览周期表,你可以得到钠的离子化能，第一电离能，大约，当你转换的时候，是巨大的。

麻省理工公开课 - 固态化学导论课程节选

And that way you can flip around in it a lot easier."

这样翻起来就容易多了“

耶鲁公开课 - 新约课程节选

The flip side is there are going to be a couple of lectures now where it is not going to be on the test, so I think you will deal with it.

现在这种对立面将是,一些现在的课程,这些不会在考试上出现，所以我想你能处理好的。

麻省理工公开课 - 固态化学导论课程节选

So if we square sigma 1 s star, we flip the amplitude so it's all positive now, but again we still have this node right in the middle.

如果我们平方1s星，我们把振幅翻转所以现在都是正的，但同样在中间有个节点。

麻省理工公开课 - 化学原理课程节选