character: Emma
topic: 可持续农业与土壤保护
grade: 6
subject: Foreign Language
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character: Emma
topic: 可持续发展与生态保护
grade: 6
subject: Foreign Language
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character: Emma
topic: 农田管理与生物多样性
grade: 6
subject: Foreign Language
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character: Emma
topic: 环境保护的重要性
grade: 6
subject: Foreign Language
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