電信革命演講_英文_PPT

1、 Telecommunication has become an important part of our daily life and deeply effects modern society. Generally telecommunication is the transmission （傳送）（傳送） of signals over a distance for the purpose of sending information. By sharing information, people can get such a development today. Informatio

2、n is even considered to be a standard to assess life quality of a man. Telecommunication is now understood as a system consists of three elements: a transmitter（發(fā)射（發(fā)射機(jī)，傳送者）機(jī)，傳送者） that takes information and converts（使轉(zhuǎn)變）（使轉(zhuǎn)變） it to a signal; a transmission that carries the signal; and a receiver that

3、 receives the signal and converts it back into usable information. Some other telecommunication systems such as mobile telephones, computers in network act as both a transmitter and receiver or a transceiver. In earlier times telecommunication was done slowly by mean of simple methods such as the us

4、e of smoke signals(狼煙), semaphore（打旗語）（打旗語）(semsem,f ,f) pigeon post (信鴿)WithAdvantages Telecommunication brings people nearer. By using mobile telephones and internet, people over the world can talk to each other and share information, photographs, profiles and events. There are even communities fo

5、unded by internet users. No longer we need to wait for weeks even months to get hand writing letters. Disadvantages Some people warn that the increasingly use of telecommunication will hurt human beings ability of social communication which based on the face-to-face. Its true. Telecommunication brings us negative affects as well as convenience. Conclusion Both advantages and disadvantages exist in using telecommunication tools frequently. The digital connection cannot replace the sense which felt by your eyes, face and mouth which carry more means, but we ha