波导线

例句：

1. 1. The waveguide is used to transmit electromagnetic waves.
   波导用于传输电磁波。
2. 2. The engineer designed a new waveguide for the project.
   工程师为该项目设计了一种新的波导。
3. 3. The waveguide is crucial in the transmission of high-frequency signals.
   波导在高频信号的传输中至关重要。