wireless telegraph fog signal

例句：

1. 1. The wireless telegraph was invented in the late 19th century.
   无线电报在19世纪末被发明。
2. 2. The government has been using this method to communicate with its citizens.
   政府一直在使用这种方法与公民沟通。
3. 3. The wireless telegraph allowed people to send messages quickly and efficiently.
   无线电报使人们能够快速而有效地发送信息。