The site urinary tract obstruction and hydronephrosis could be clearly shown.结果所有病例均清晰显示梗阻部位及尿路积水情况.Objective To investigate the ultrasound diagnosis and prognosis of fetal hydronephrosis.目的探讨胎儿肾盂扩张积水的超声诊断和预后.Follow - up...
Rescuers used props to stop the roof of the tunnel collapsing.救援人员用支柱防止隧道顶塌陷。...the backdrop and props for a stage show.一场舞台剧的背景幕和道具Wood is still extensively used for props.木材仍广泛地用于支柱.I had two props in my life; one was ...