短语词组短语gum artummyicic tree 阿拉伯胶树gum arabic tree 阿拉伯胶树;胶树;阿拉伯金合欢gum rbic tree 阿拉伯胶树Gum -tree 桉树wadalee -gum-tree 儿茶acaroid gum grass tree gum 禾木胶Formosan sweet gum Fragrant tree 枫香up a gum -tree 骑虎难下Red Gum Tree 红色尤加利树 返回 gum tree