【摘要】通讯方式的变化英语作文 With the rapid development of science and technology, munication methods of people have changed a lot. In the long history of the past, people municated with people who were far from them only by letters, which took a very long time to get the message. In the late 19thcentury, telephone was invented, but it was not widely used. Letter is still the main method. Later, telegraph came in
