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- climatic changes (3)
- earthquakes (2)
- environmental aspects (2)
- history (2)
- tsunamis (2)
- volcanic eruptions (2)
- 《水浒》研究 (2)
- anthropology (1)
- economic development (1)
- human ecology (1)
- natural history (1)
- north china plain (china) (1)
- pollution (1)
- purification (1)
- science (1)
- water (1)
- yellow river (china) (1)
- 人物评论 (1)
- 古典小说 (1)
- 小说研究 (1)
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