短语词组短语threefold axis 三重轴;三次轴Threefold Refuge 三皈依threefold truth 三谛threefold coincidence 三重符合threefold ring 三联环threefold twin 三连晶threefold fragmentation 三重碎裂Threefold Canon 三藏threefold symmetry 三次对称;[数]三重对称 返回 threefold