And, the line is the trajectory of a point as time varies.

这条直线可以看做是点随时间运动的轨迹。

youdao

So, now, let's try to paint, actually, the trajectory of a point.

现在我们来描绘一下点的轨迹。

youdao

So, think of a line as the trajectory of a moving point.

把直线看作运动点的轨迹。

youdao

So, think of a line as the trajectory of a moving point.

把直线看作运动点的轨迹。

youdao