在未发明电报以前,人们主要依赖驿送、信鸽、信狗和烽烟等方法进行长途通信。这些传递信息的方法不但存在速度慢、种类少、不准确的缺点,而且还有可能使信息投递不到。那么,电报的发明人莫尔斯是怎么想到要发明电报,又是如何让信息长上 Before the telegram was invented, people rely mainly on postal delivery, carrier pigeons, letter dogs and beacons to conduct long-distance communications. These methods of information transmission not only have the shortcomings of slow, small, inaccurate, but also may make the information undeliverable. So how did Morse, the inventor of the telegraph, think of inventing the telegram and how to make the message longer