The SD of tricuspid annuli began to increase 3 month after operation (P<0.05).

术后3月三尖瓣环下移距离有所增大（P<0.05）；

The bipolar coordinate system in which the two boundary circles of eccentric annuli become the coordinate surfaces is used.

使用双极坐标系研究流体在偏心环空内的流动。

The SD of mitral and tricuspid annuli were more lower than control group (P<0.01), and E velocity of mitral flow is higher (P<0.01) .

患者较正常对照组心脏二尖瓣环、三尖瓣环下移距离显著减小（P<0.01），二尖瓣E波最大流速显著增大（P<0.01）；

An experimental study on forced convection heat transfer of single-phase water in vertical and horizontal narrow annuli was performed.

对竖直及水平窄缝环形流道内单相水受迫对流换热进行了实验研究。

Atmospheric corrosion is generally associated with surface storage conditions, or with upper wellbore annuli that may not be fluid-filled.

大气腐蚀通常与地面储存条件或没有被流体充满的上部井筒环空有关。