| 单词 | savanna | 
| 释义 | savanna [sǝ`van·ǝ]  ECOLOGY Any of a variety of physiognomically or environmentally similar vegetation types in tropical and extratropical regions; all contain grasses and one or more species of trees of the families Leguminosae, Bombacaceae, Bignoniaceae, or Dilleniaceae.  | 
	
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