The proper way to draw a vector is to draw an arrow that's got a beginning and it's got an end.

画矢量的正确方法是,画一个有起点和终点的箭头

耶鲁公开课 - 基础物理课程节选

So, for the most part any time we talk about or draw pointers an arrow suffices, which really 71 in there is a number like 71, which is the literal byte that the F is actually in in RAM, but frankly who cares?

所以，每次我们讨论,或者用箭头表示指针,在指针里面有一个数字，如,那是F在RAM中的字节，但是谁在乎它呢？

哈佛公开课 - 计算机科学课程节选

Now, you realize that... By the way, when you draw a vector like A, you're supposed to put a little arrow on top.

现在,大家应该发现...,顺便提一下,当你画了一个矢量,比如 A 时,上面要加个小箭头

耶鲁公开课 - 基础物理课程节选

You can draw the arrow corresponding to A.

你可以先画一个表示 A 的箭头

耶鲁公开课 - 基础物理课程节选