Cách sử dụng
A telegraph is a machine used long ago for sending messages over long distances. People would type out their message and the telegraph would send it to another machine in a different place. It was like texting, but without phones or internet! Nowadays, we don't really use telegraphs anymore because we have newer and faster ways to send messages like email or text messaging. However, you might still hear the word telegraph used to refer to a message that is sent quickly and efficiently.