oscilloscope trace

例句：

1. 1.The engineer used a scope to trace the faulty circuit.
   工程师使用示波器来追踪故障电路。
2. 2. The scientist conducted experiments to trace the chemical reaction.
   科学家进行了实验以追踪化学反应。
3. 3. The detective analyzed the crime scene with a magnifying glass to trace the footprints.
   侦探用放大镜分析了犯罪现场，以追踪脚印。