短语词组短語Power of flow 流動之力power -flow distribution 能流分佈reactive power optimal flow 無功優化power oscillation flow 功率振蕩增量Power Doppler Flow Imaging 能量多普勒血流顯像;多普勒血流顯像power energy flow 動力能源Parallel power -flow 竝聯功率流 返回 power flow