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利弊分析类大作文，社会类话题
Space travel has been possible for some time. Some people think space tourism would develop in the future. Do you think space tourism is a positive or negative development?
题目来源：2013年7月6日大陆雅思大作文
题目大意
太空旅行已经成为可能。一些人觉得太空旅行在未来会得到发展。你认为发展太空旅行是一个积极的还是消极的趋势？
写作思路解析
这是典型的优劣势类题目。这类题型好坏出必须都有提到，可以持中立观点也可以有倾向性。不管哪种观点，都要做到立场始终一致，并且尽量在结尾处做一个升华。
太空探索类型的的题目近几年都有考察，包括练习外星人。这类题目的本质几乎都是分析好坏处。一般好处围绕促进就业，推动科技进步，帮助了解宇宙知识等层面展开；而坏处则围绕耗资巨大，有风险，太空污染这几个层面展开。
提纲梳理见下
高分写作示范
Space tourism has always been a fascinating thing for humans. Just like the other tourisms like ecotourism, medical tourism, sports tourism, business tourism, etc., space tourism has become successful in gaining the attention of people worldwide. However, whether it will be a boon or ban in the future has caused a heated debate. In my opinion, there are both positives and negatives.
The first benefit is the jobs that the industry is going to provide. To be specific, with more and more companies are taking interest into space tourism, a high number of jobs for the researchers, scientists, explorers, pilots, programmers, operators, and much other support staff will be available in next few years. Also, to make a space tourism business, shuttles, planes, and many other things will be needed. Therefore, the demand for the particular manufacturing unit will be there and so as the related jobs to it.
Another advantage of space tourism is going to be its ability to renew interest in space and space exploration. With renewed interest, financial backing will follow, and that will support further innovation in the industry and space exploration in general. In this case, the space program will help to know whether human life is possible on Mars or not and many other things in the future.

However, this is not a perfect picture. Every space tour involves a significant risk of catastrophic disasters which can result in a loss of human lives. So, the companies have to take care of all the safety concerns and make every prudent step to ensure the safe journey to space, with the extremely hostile environment of the space anything can happen. Moreover, the space industry also creates environmental problems with the launch of space shuttles, satellites, rockets, and other equipment. It also raises the issue of global warming in the world as there are many no recyclable resources used in space tourism programs.
To conclude, whether to develop the space tourism depends on how we see it and how the industry handles it. If the missions are carried with extreme precautions of safety and other standards, then it will generate a lot of advantages. On the other hand, if it will be held only for the fundraising and just for the pleasure of the eyes to see the universe, then it may end up with the wrong outcome.
相关词汇和语法结构
Boon 福利
catastrophic disasters 重大灾难
Shuttle 航天飞机
Precaution 预防，警惕
Fundraising 筹集资金