短语词组短语birch h forest 桦林Birch ĥ Forest 白桦林Birch U Forest 白桦林Birch E Forest 白桦林poplar -birch natural forest 天然杨桦林Of white birch forest 白桦林poplar birch forest 杨桦林polar birch forest 杨桦林 返回 birch forest