track circuit selection

例句：

1. 1. The track circuit was designed to detect the presence of a specific signal.
   这个跟踪电路被设计用来检测特定信号的存在。
2. 2. The engineer selected the best track circuit for the project.
   工程师为该项目选择了最佳的跟踪电路。
3. 3. The team carefully selected the track circuit that would provide the most accurate results.
   团队仔细选择了能够提供最准确结果的跟踪电路。