电报

在现代海底光缆和卫星通讯尚未发明的年代，越洋有线电报是跨国紧急联络沟通最快捷的手段。

zài xiàn dài hǎi dǐ guāng lǎn hé wèi xīng tōng xùn shàng wèi fā míng de nián dài, yuè yáng yǒu xiàn diàn bào shì kuà guó jǐn jí lián luò gōu tōng zuì kuài jié de shǒu duàn.

In an era when modern undersea optical cables and satellite communications had not yet been invented, transoceanic wire telegraphy was the fastest means of cross-border emergency communication.