tracing study

例句：

1. 1. The detective was tracing the movements of a suspect.
   侦探正在追踪嫌疑人的行踪。
2. 2. The scientist is trying to trace the origins of the disease.
   科学家正试图追溯这种疾病的起源。
3. 3.She traced her way back to the main road after losing her way in the forest.
   她在森林中迷路后，找到了回主路的路。