Students are often told that this is just a notational trick.

学生们经常被告知这只是一个符号技巧。

And sure, in some sense, this is just a notational but there is a reason for doing it.

当然 在某种意义上 这只是一个符号 但这样做是有原因的。

But just the notational difference, if you ever see this, you know you're dealing with a sample.

但只是符号上的差异，如果你看到这一点，你就知道你正在处理一个样本。

I realize I made a slight notational error, and it might have confused you a little bit.

我意识到我犯了一个轻微的符号错误，它可能会让你有点困惑。

So the answer that we found earlier computationally, using that special notational trick, must correspond geometrically to this vector.

所以我们之前计算得到的答案 用那个特殊的符号技巧 一定在几何上对应于这个向量。

And that's equal to, once again, the sum of the elements in the sample, right, and then you have a slight notational difference.

这再次等于样本中元素的总和，对吧，然后你有轻微的符号差异。