用英语写一篇短文，描述你的一次旅行。
Last summer I went to Vietnam with my parents. We stayed at a small village outside Saigon.
The air and water was very clean and there were many kids playing in the mud along with water buffalos.
Though it's a very poor country, the kids seem to be happy. They live with their farmer parents in little houses built with dirt and straw and help out a lot in the rice field during the day.
They don't have TVs or Internet, but they enjoy a lot playing outside. It was a very memorable trip that I will never forget.
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