求翻译：我是一个世博会的自愿者.在这期间发生的一件事让我感触很深。我看到一对中国夫妇和一对外国夫妇在吃完饭后外国把垃圾带走了而中国夫妇没有。是什么意思？

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I was one of the expo volunteers took place during the period in which one thing that made me touched me deeply. I saw a couple of China and a foreign couple who after a meal in the foreign countries have taken away the Chinese couple with no rubbish.

I am a World Expo volunteer. In this period occurs a matter lets my feelings be very deep.I saw but after finished eating the food to a pair of Chinese husband and wife and pair of foreign husbands and wives the foreign country to carry off trash Chinese husband and wife not to have.

I am a World Expo volunteers. occurs during this period one of the things I felt very deep. I saw a Chinese couple, and a foreign couple in meal foreign and Chinese couples no litter.

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