since world warii, science and technology have developed a great deal. in the next century, this trend will undoubtedly continue. all kinds of technology are to be improved at a terrible rate. this development will bring great benefits both to our everyday life and recur work. at the same time, it will also improve industrial and agricultural produc tion.

　　on the other hand, this development is sure to bring about some new probems we have never met before or, at least, to make some present problems even worse. if some new species of animals were really turned out by the gene engineering one day, what would our world be like then? and once the artificial intelligent robots were put into use, what would these clever "people" do to their producers?

　　in spite of all these problems we will not go back to lead the life our forefather led. the only way is to improve science and technology and to find out all ways to solve those problems. that is difficult. but we, the constructors of the new century, will surely turn them into reality.