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　　题目

　　Space travel has been possible for some time and some people think space tourism could be developed in the future. To what extent do you think this is a positive or negative development?

　　范文

　　As we all know, people are always curious about space and expecting to travel in space. Now, inspired by space technology, some ambitious explorers have extended their eyes beyond the earth. But there are still a few key problems which may prevent space travel from becoming a reality. So I'm holding a negative view on the future of space travel.

　　In modern society, some businessmen have built numerous tourist sites for economic benefits, considering little of the ecological balance, so that a lot of damages have been done to the natural environment. Now, universe, a kind of new resource in some people’s eyes, has great potential benefits especially in terms of space tourism, which will certainly attract many profit-seeking businessmen. Yet if the space travel is developed on a large scale before we have gained a full understanding of the universe, the ecology of the universe will be seriously upset. Then what is at stake will not be one or two tourist sites, but the entire earth.

　　As space tourism has just started recently, the security issues of space flight should also be taken into consideration. In the space travel, the tourists must be able to withstand the unbearable loud noise, the overwhelming vibration, the strong radiation, the physiological effect of weightlessness, to mention just a few. However, the current science and technology cannot guarantee everything is without risk. Therefore, space tourism may pose great pressure on people’s health. Moreover, ordinary passengers are not possibly trained as astronauts, so psychologically and physiologically, they may not be suitable to do space travelling.

　　To sum up, space travel is detrimental to the universe environment and may have a lot of risks out of our control, so basically I hold a negative view on its future. I think space travel is possible only when we have a better understanding of the universe and meanwhile a strong technological support.