line telegraphy

例句：

1. 1. Line telegraphy is a method of transmitting information over long distances using electrical signals.
   线路电报是一种使用电信号在长距离上传输信息的方法。
2. 2.In line telegraphy, messages are sent along a series of wires, each carrying a different signal.
   在线路电报中，信息沿着一系列电线发送，每条线携带着不同的信号。
3. 3. The line telegraphy system was developed to improve communication between distant locations.
   线路电报系统被开发出来，以改善远距离地点之间的通信。