character: Sophia
topic: 保护环境的实际行动
grade: 6
subject: Foreign Language
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character: Mike
topic: 如何减少塑料使用
grade: 6
subject: Foreign Language
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character: Emma
topic: 节约用水的重要性
grade: 6
subject: Foreign Language
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character: Tom
topic: 可再生能源的好处
grade: 6
subject: Foreign Language
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