annulus
英
美
n. 环形物，环带（节、体）；圆环域
COCA.36877
英英释义
noun
- (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
- a toroidal shape
- a ring of ships in the harbor
- a halo of smoke
双语例句
- Effect of Aortic Annulus Plastic Enlargement on Aortic Valve Replacement
主动脉瓣环扩大术在主动脉瓣置换术中的应用 - A novel gas-liquid self-sucking nozzle with inward-convex annulus structure was equipped to study the dissolution of oxygen.
建立实验装置，研究一种带凸形圆环结构的新型自吸式气液二相喷嘴的吸气溶氧性能。 - When notochord organization is ceaseless and migratory, fiber annulus also increases.
在脊索组织不断迁移时，纤维环亦增大。 - Sleeve used to establish between the tubing and annulus flow channel, or used to control the production of disposable isolation layer or layers.
滑套用于建立油管和环空之间的流动通道或用于控制生产层或隔离弃层。 - Study on Annulus Pressure Distribution after Perforation of Composite Perforators
复合射孔器射孔后环空压力分布试验研究 - Mitral annulus velocity detected by TDI is sensitive and reliable to evaluate left ventricular function in heart failure children.
以TDI方法测定二尖瓣环运动频谱评价心力衰竭儿童左室功能是敏感和可靠的。 - Objective To probe the value of mitral annulus peak systolic flow velocity and systolic displacement in evaluating left ventricular systolic function of dilated cardiomyopathy patients.
目的探讨二尖瓣环收缩期峰值速度及收缩期位移评价扩张型心肌病患者左室收缩功能的价值。 - The two-dimentional motion differential which fits for non-Newtonian fluid in eccentric annulus with permeable well wall is studied in this paper.
本文研究了适合带渗透性井壁的偏心环空非牛顿流体二维运动微分方程式。 - To reduce the pollution of the oil-gas well towards the bottom after its fracturing and decrease the operation costs, the hanger specially used for annulus feeding fracturing was developed.
为了减轻油气井压裂后对地层的污染并降低作业成本，研制了高强度环空压裂专用悬挂器。 - The diffraction of super Gaussian beams by an elliptic annulus is studied numerically.
本文采用数值计算方法讨论了超高斯光束经椭圆环的衍射现象。