The progresses in five - membered heterocyclic metallocene analogic complexes and their application in olefin polymerization are reviewed. 综述了五元杂环类茂金属配合物的研究进展及其在烯烃聚合中的应用.
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 ...
Anne is a Lancashire lass from Longton, near Preston.安妮是兰开夏郡姑娘，老家在普雷斯顿附近的朗顿。Lancashire-born Miss Richardson lives alone in London.出生于兰开夏郡的理查森小姐独自一人住在伦敦。a member of Lancashire County Council兰开夏郡政务委员会...