2 sentences for 轨迹 (guǐ​jì — track)

1. 每个人的成长轨迹都是独一无二的。

   měi gè rén de chéng​zhǎng guǐ​jì dōu shì dú​yī​wú'èr de.

   Everyone's growth trajectory is unique.

   Source: Dong Chinese Dictionary

2. 家中突遭变故，他的生活轨迹彻底改变了。

   jiā zhōng tū zāo biàn​gù, tā de shēng​huó guǐ​jì chè​dǐ gǎi​biàn le.

   A sudden misfortune in his family completely changed the course of his life.

   Source: Dong Chinese Dictionary