翻译一下这段话 ， 一定要正确。在线求答案，急

作为上海世博会的一名志愿者。As the Shanghai world expo a volunteer.
在此期间经历的一件事让我特别难忘。During the experience one thing let me special unforgettable.
一对中国夫妇和一对外国夫妇在草坪上吃饭，One pair of Chinese couples with a pair of foreign couple on the lawn for dinner
中国夫妇直接将垃圾扔在草坪上Chinese couple directly will rubbish on the lawn
外国夫妇觉得不该乱扔垃圾。foreign couples feel shouldn't litter
我觉得中国人的素质远不如外国人I think the Chinese quality rather than foreigners,
我们应该提高自身素质，保护好我们的环境we should improve their own quality, protect our environment

As the Shanghai world expo a volunteer.During the experience one thing makes me very unforgettable.One pair of Chinese couples with a pair of foreign couple on the lawn eat,
Chinese couple throw the rubbish on the lawn directly, foreign couples feel shouldn't have done that.I think that the Chinese quality is not so good as foreigners,We should improve their own quality and protect our environment.

As a Shanghai Expo volunteer,one thing that I experienced during the Expo was very memorable.When dining outside on the lawn,a Chinese couple threw the waste on the lawn while a foreign couple thought it not right.It strikes me that the quilities of Chinese are inferior to foreigns'.So i think we should improve oneself quality and protect our environment.

As the Shanghai world expo of a volunteer during this experience one thing let me special unforgettable one pair of Chinese couples with a pair of foreign couple on the lawn for dinner, Chinese couple directly will rubbish on the lawn, foreign couples feel shouldn't litter I think the Chinese quality rather than foreigners, we should improve their own quality, protect

As a volunteer of Shanghai Expo, there was one thing that left me a great impression. A Chinese couple had a meal on the grass and afterwards threw their litter on the grass; a foreign couple thought it was an unagreeable act. In my view, we Chinese people are far worse than foreigners in self-discipline. And we ought to escalate our self-discipline, and to protect the environment.

As the Shanghai world expo a volunteer. During the experience one thing let me special unforgettable. One pair of Chinese couples with a pair of foreign couple on the lawn for dinner, Chinese couple directly will rubbish on the lawn, foreign couples feel shouldn't litter. I think the Chinese quality rather than foreigners, we should improve their own quality, protect our environment