海底电报

例句：

1. 1. The submarine telegraph wasa revolutionary tool for communication during World WarII.
   二战期间，潜艇电报是通信的革命工具。
2. 2. The submarine telegraphwas used to transmit messages from the battlefield to headquarters.
   潜艇电报被用来将战场信息传送到总部。
3. 3. Inthe early days of thesubmarine telegraph,it was considered a marvel of technology.
   在潜艇电报的早期阶段，它被认为是一项技术奇迹。