短语词组短語drooping characteristics 下垂特性drooping birch 歐洲白樺Drooping Willow 垂柳apex drooping 前緣下彎drooping shoulder 塌肩drooping ear 垂耳drooping carpesium 挖耳草drooping willows 垂柳drooping ears 耳下垂 返回 drooping