2 sentences

1. 这两条线互相垂直。

   zhè liǎng tiáo xiàn hù​xiāng chuí​zhí.

   These two lines are perpendicular to each other.

   Source: Dong Chinese Dictionary

2. 该向量在垂直方向上的分量为零。

   gāi xiàng​liàng zài chuí​zhí fāng​xiàng shàng de fēn​liàng wéi líng.

   The component of this vector in the vertical direction is zero.

   Source: Dong Chinese Dictionary