Describe one of the most important inventions in recent 100 years. Explain why it is so important. Your explanation should include specific examples and details.

       Well, in my opinion the most important invention of the last 100 years is mobile phone.The fist reason for why I choose it is that, by using a mobile phone, the distance between one another is significantly shortened. For example, I can send messages or make a phone call to connect with my boy friend in Shanghai which is 1400 miles away from here in Beijing no matter when and no matter where. But before mobile phone was invented, I have to wait several days at least to get some information for him.

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