For example, F x y z if I have an equation that looks like this, f of x, y, z.

打个比方，我有个这样的方程。

麻省理工公开课 - 固态化学导论课程节选

So I said that we want to be talking about valence electrons here, so that means if we're talking about, for example, the octet rule for an f f molecule where we have two fluorine atoms, we need to write the valence electrons as dots around them.

我说过我们在这要讨论的是价电子，这就意味着，如果我们要讨论，比如，关于两个氟原子组成的分子的八隅体规则,我们首先需要把价电子画成围绕在它们周围的点。

麻省理工公开课 - 化学原理课程节选

You can also assign to a list, or to an element of a list. So ivy sub 1, f -15 or example, could be assigned minus 15, and that will actually mutate the list.

此外你还可以给一个数组，或者数组内部的元素赋值,比如ivy。sub，可以被赋值为，这确实改变了数组。

麻省理工公开课 - 计算机科学及编程导论课程节选

To continue entering data beyond the last row I filled in my example, copy columns F through O from the previous row each time you add a new row.

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