1 sentence

1. 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