要求：1. 根据所提供的内容，适当拓展想象，灵活地将所提供的信息体现现在文章中。 2. 条理清楚，语句通顺，标点正确，书

possible vision:
Hi, everyone,
I am very happy to show my opinion about space travel.
It is really exciting to travel in space. Space travel can broaden our eyes to understand the universe better. It is also a new experience for most people to travel in space. With the development of space travel, people must be able to explore more new places and sources from outer space for themselves.
However, space travel may be dangerous. The trip will take a long time and it may not be comfortable. And only rich people can try it because it will cost lots of money which can be used in many other ways.
In a word, though there are some disadvantages, I think it is still a good thing.
Thank you for listening.

这是一篇给材料作文，写一篇关于太空旅行的议论文。写作中注意首先要说明什么是太空旅行，注意从正反两方面论述太空旅行的优缺点。本文主要是一般现在时态，注意主谓一致问题。写作中注意适当使用连词，序数词，上下文联系紧密，符合逻辑关系。