Question

telegraph 【TELEGRAPH】Mother sent me a message by telegraph that she would arrive home by afternoon plane. 妈妈打一个电报给我说她将坐下午的飞机回家。【重点词汇】telegraph n. 电报

Accepted Answer

['telɪɡræf] 
telegraphapparatus used to communicate at a distance over a wire (usually in Morse code)
Forget about the internet! Before even the telephone was invented, the telegraph — a device used to communicate via electronic signals — was the main mode of communicating long distance. We've come a long way!
The telegraph is an outdated form of communication as far as sending long-distance messages goes.  It uses an electric signal broken to create a code that then transmits over a wire and translates into a message. Alexander Graham Bell started tinkering with the telegraph and ended up inventing the first "harmonic telegraph" to transmit sound through a wire — which led to the birth of the modern telephone.
All forms of 'telegraph' will appear on average once every 283 pages.telegraphtelegraphictelegraphically

Front	telegraph
Pron	['telɪɡræf]
Back	【TELEGRAPH】 Mother sent me a message by telegraph that she would arrive home by afternoon plane. 妈妈打一个电报给我说她将坐下午的飞机回家。【重点词汇】 telegraph n. 电报
Vocab	telegraphapparatus used to communicate at a distance over a wire (usually in Morse code) Forget about the internet! Before even the telephone was invented, the telegraph — a device used to communicate via electronic signals — was the main mode of communicating long distance. We've come a long way! The telegraph is an outdated form of communication as far as sending long-distance messages goes. It uses an electric signal broken to create a code that then transmits over a wire and translates into a message. Alexander Graham Bell started tinkering with the telegraph and ended up inventing the first "harmonic telegraph" to transmit sound through a wire — which led to the birth of the modern telephone. All forms of 'telegraph' will appear on average once every 283 pages. telegraph telegraphic telegraphically

Telegraph Wire Communicate Long Telɪɡræf Mother Message Arrive