So, if you have a line in space, well, you can imagine may be that you have a point on it.

如果在空间里有一条直线，你可以想像出来上面有一点。

youdao

So, if you have a line in space, well, you can imagine may be that you have a point on it.

如果在空间里有一条直线，你可以想像出来上面有一点。

youdao