相交

zhè liǎng tiáo xiàn xiāng jiāo yú yī gè diǎn

这两条线相交于一个点。

The two lines intersect at a point.

yuán zhōu nèi liǎng zhí jìng bì xiāng jiāo

圆周内两直径必相交。

Any two diameters of a circle intersect each other.

xiāng jiāo jīng nián

相交经年

have been friends for years