tracing distortion

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. She traced her steps back to the scene of the crime.
   她追溯自己的行踪，回到了犯罪现场。
3. 3.The scientist is tracing the origins of the virus through genetic analysis.
   科学家通过基因分析追踪病毒的起源。