好象能写很多。我先试试了。
Pro: Telecommunications have made the world shrunk. Cell phones, as one of the greatest inventions in the 20th centry, have realized real-time communication among people.
Against: Cell phones have been recognized as a disturbance of personal privacy. 然后再说说人们怎么样联系打扰了私人空间。可以举例说明。
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