2 sentences

1. 屏幕上出现了一道纵向的蓝色条纹。

   píng​mù shàng chū​xiàn le yī dào zòng​xiàng de lán​sè tiáo​wén.

   A vertical blue stripe appeared on the screen.

   Source: Dong Chinese Dictionary

2. 这项纵向研究追踪了受访者十年的生活变化。

   zhè xiàng zòng​xiàng yán​jiū zhuī​zōng le shòu​fǎng​zhě shí nián de shēng​huó biàn​huà.

   This longitudinal study tracked changes in the lives of respondents over ten years.

   Source: Dong Chinese Dictionary