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- 研究 (7)
- 通俗读物 (4)
- management (3)
- photoshop (3)
- social aspects (3)
- biodiversity conservation (2)
- citizen participation (2)
- climatic changes (2)
- education (2)
- emergency management (2)
- hazard mitigation (2)
- history (2)
- history and criticism (2)
- human ecology (2)
- methods (2)
- national parks and reserves (2)
- natural disasters (2)
- political activity (2)
- prevention (2)
- sustainable development (2)
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