character: Jack
topic: 环境保护者
grade: 6
subject: Foreign Language
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character: Emma
topic: 土壤保护的重要性
grade: 6
subject: Foreign Language
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character: Liam
topic: 可持续发展的概念
grade: 6
subject: Foreign Language
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character: Sophia
topic: 保护环境的实际行动
grade: 6
subject: Foreign Language
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