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

We could draw yet another picture of a different way a life could come to an end.

我们能描绘另一幅生命开始和结束的画面。

耶鲁公开课 - 死亡课程节选