If any of these points are connected to each other, then we have found a triangle of three mutual friends. (these two points are connected, plus they are both connected to the original point).

如果这些点相互连接，我们得到一个三角形，有三对人互为朋友。(四个点中的两个点相连，加上它们又都与最初的一个点相连)。

youdao

Galactic matter orbits around a central point because its mutual gravitational attraction creates centripetal forces.

由于星系的重力产生了向心力，所以星系的物质体是环绕着一个中心点运行的。

youdao

At present, the critical point in the Iranian nuclear issue is to build mutual trust between Iran and the international community.

现在问题的关键是伊朗和国际社会需要建立互信。

youdao

If you really want to talk to me, then do your job and sleuth a mutual point-of-contact.

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