2 sentences

1. 他在纸上画了一道横向的线条。

   tā zài zhǐ shàng huà le yī dào héng​xiàng de xiàn​tiáo.

   He drew a horizontal line on the paper.

   Source: Dong Chinese Dictionary

2. 各部门之间需要加强横向联系。

   gè bù​mén zhī​jiān xū​yào jiā​qiáng héng​xiàng lián​xì.

   Horizontal communication between various departments needs to be strengthened.

   Source: Dong Chinese Dictionary