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Technology emerged as soon as human race came into this world and began to fight for surviving. In the early stage, technology served as the implements for human beings to conquer the nature. In the process of struggling against all the menaces of the nature, our ancestors have generalized and accumulated all sorts of experience, and also created a series of technology in order to help the descendents to adapt the environment. This circumstance has been continued until the technology that accumulated by human race are powerful enough to overcome most of the threats of the nature. Then the twofold use of technology began to appear. On the one hand, the technology has made the dominators possible to strive for convenient and luxurious life. On the other hand, the governors also use it to quash the rebellions and exploit their people, even sometime, to fight with other nations. With the advent of the Industrial Revolution, technology began to contribute to the majority of human beings.