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最佳答案：太阳能汽车的优点是安全和清洁,普通汽车会污染环境翻译：The advantages of solar energy is safe and clean,ordi
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最佳答案：Responsibility ensures securityYouth dedicates to the ocean
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最佳答案：In order to toilet public environment and your own safety,please don't stand on
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最佳答案：Municipal administration public work grade-one construction always contracts the
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最佳答案：In order to protect the safety of drinking water of the city,NYC started a mega