I've just realized. So I'll do it like that.

我刚刚意识到，所以我将往。

Let's call that x sub n with a line on top of it.

我们把它叫作带有上线的xn。

This little subscript two tells us there's two of the hydrogen atoms in this molecule.

这个小2告诉我们这个分子中有两个氢原子。

Linguists will sometimes denote referents in text by using subscript numbers or letters.

语言学家有时会使用数字或字来表示文本中的指代对象。

And the oxygen, since there's only 1, we don't write 1 subscript underneath that.

而氧气, 因为只有 1, 所以我们不在面写 1 个。

Later, for no special reason, the fashion became to render the number as subscript H2O.

后来, 由没有特殊原因, 时尚变成了将数字表示为H2O。

So this equals the sum from i equals 1 to n of x sub i squared.

所以这i1到n的xi的平方之和。

Now we're going to--notice there's no subscript on this P and you'll see why in a second.

现在我们要——注意这个 P 上没有，你马上就会明白为什么。

Oh, yeah, that means velocity with a  subscript of x means velocity final in the x-direction.

哦，是的，这意味着速度为 x 表示 x 方向的最终速度。

Similarly, statistical significance can be neatly indicated using subscripts and footnotes, as I did in the original table.

同样，可以使用和脚注整齐地表示统计显着性，就像我在原始表格中所做的那样。

Then you have x sub i times minus mu.

然后你有xi乘以减去均值μ。

And so in any equation like this the little subscripts are going to stand for the number of atoms.

因此, 在任何像这样的方程中, 小将代表原子的数量。

This is the same thing as x sub i squared minus-- this is your little algebra going on here.

这和将xi的平方减去——这里有些简单的代数运算。

And then you have minus mu times x sub i.

然后你有减去mu乘以xi。

The 2 here, the subscript means that's the number of atoms of hydrogen that we have in one hydrogen molecule.

这里的 2 表示个氢分子中氢原子的数量。

If you had an x sub i here, you would use the first x term, then the second x term.

如果你在这里有个为i的x，你会先使用第个x项，然后是第二个x项。

And then you have another one, minus mu x sub i.

然后你又有另个，减去μ乘以xi。

So when you add those two together, you get minus 2x sub i mu, because you have it twice.

所以当你把这两项加在起时，你会得到负2倍的xi乘以均值μ， 因为你会有两项这样的结果。

When you add them together, you get minus 2x sub i mu.

当你把它们加在起，得到的结果是减去2倍的xi乘以均值μ。

And position final, or x, minus position initial, or x with a subscript of zero, equals  change in position or displacement.

最终位置或 x 减去初始位置或为零的 x 位置或位移的变化。