A point on one line, its corresponding point on the other line, and the center of perspectivity are collinear.

一条直线上的一个点，它在另一条直线上的对应点以及透视中心这三个点共线。

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A one-to-one correspondence between the points on two lines determined by a given point, not on either line, called the center of perspectivity or point of perspectivity.

由一给定点确定的、两条直线上的点之间的一一对应，该给定点不在这两条直线上，称为透视中心或透视点。

youdao

A one-to-one correspondence between the points on two lines determined by a given point, not on either line, called the center of perspectivity or point of perspectivity.

由一给定点确定的、两条直线上的点之间的一一对应，该给定点不在这两条直线上，称为透视中心或透视点。

youdao