University campus should be clean and quiet for students to learn knowledge. Students also need a safe environment. So it is not good to open the university for tourists.

University is students’ fight goal, entering the university means the promising future for students. In most university campus, the scenery is very beautiful, some campus are even the hot tourist sites. Like Cambridge and Oxford, many people go there to have a look at the beautiful sites. Campus seem to be the open to tourist sites, I think it is not good to be open.
大学是学生奋斗的目标，进入大学对学生来说意味着有一个光明的未来。在大部分大学校园里，风景是很漂亮的，一些大学校园甚至成为热门的旅游景点。比如剑桥和牛津，很多人去那里只为看一眼美丽的风景。大学校园似乎对旅客开放，我觉得开放是不好的。 
On the one hand, when tourists come, there will be a lot of rubbish. We always hear about the news that in the tourist sites, many rubbish are left, which makes the sites polluted. University campus are the places for students to study, the places should be clean and quiet. 
一方面，当游客来到校园，就会带来很多的垃圾。我们总是听到这样的新闻，在一些旅游景点，留下了很多垃圾，使得景点受到了污染。大学校园是给学生学习的地方，应该是干净和安静的。
On the other hand, when campus is open to the tourists, it means anyone can go into the school, it will be not safe to students. Some bad people will pretend to be the tourists and go into the campus to steal things. Some students will fight against the bad guys and will get hurt. Opening the campus gives the bad guys the chance to make crime.
另一方面，当大学校园对游客开放，意味着任何人都可以进入校园，对于学生来说很不安全。一些不怀好意的人会假装成游客，进入到校园来偷窃。一些学生会和歹徒搏斗，伤到自己。开放校园给坏人带来了犯罪的机会。
University campus should be clean and quiet for students to learn knowledge. Students also need a safe environment. So it is not good to open the university for tourists.
大学校园应该是干净和安静的，有利于学生学习知识。学生也需要一个安全的环境。所以大学校园对旅客开放是不好的。