The clinical application of dimensional doppler echocardiogram in percutaneous balloon mitral valvuloplasty .
超声心动图在经皮球囊二尖瓣成形术的临床应用。
Clinical study on evaluating wound healing of uterine incision after hysterotomy by transvaginal color doppler sonography .
经阴道彩超评价剖宫产术后子宫切口愈合情况的临床研究。
By analyzing the doppler effect on the spectroscopic signals of receding stars , he established that their red shift was proportional to their distance .