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最佳答案:Nowadays,the biggest problem in our world is the environment is broken.The envir
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最佳答案:Harmony with the environment is that we live in on Earth, who is a natural son,
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最佳答案:With the improvement of our living standard, more and more people can afford a c
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最佳答案:Environmental problems are becoming more and more serious all over the orld. Wit