Hi-tech,a Double-blade Sword We have entered a new era of science and technology.The idea(concept,notion) that science and technology is the first productivity becomes increasingly popular in the world.The hi-tech is so powerful that it seems to affect every aspect of the society.We can say for...addition if a nuclear energy plant is detonated, almost of living creatures around over 10 kilometers of the earth’s surface from the explosion and about 500 meters from there to sky such as human, animal, plant and microorganisms will not grow normaly or even live because of the terrible environment.

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