短语词组短語European Red Elm 歐洲紅櫸European White Elm 歐洲白榆european elm scale 榆紅蚧smaller european elm barkbeetle 歐洲榆小蠹smaller European elm bark beetle 歐洲榆小蠹larger european elm bark beetle 歐洲大榆小蠹 返回 European elm