短语词组短语savanna forest 稀瘦原林water savanna 水泽热带草原flood savanna 泛滥平原pyrogenic savanna 火成热带草原secondary savanna 次生性稀树草原succulent savanna 肉质植物稀瘦原mountain savanna 山地稀树草原steppe savanna 稀树干草原humid savanna 潮湿稀树草原 返回 savanna