佩雷尔曼博士克服这一困难，他切断了奇点，继续运用瑞奇流并重新接合已变形的物体。
Dr Perelman overcame this difficulty by cutting off the singularities, continuing with the Ricci-flow application and then rejoining the transformed objects later.
熔岩流剖面气孔特征呈层状分布，越接近顶部气孔越大越多，变形越明显；
The closer to the top of lava flows, the more and bigger vesicle distribution and the more obvious deformation.
从结构力学角度来研究阀芯的变形及应力分布情况，进行流固耦合分析，研究其失效的可能原因。
This paper investigate the distributing complexion of distortion and-stress of valve core, make the analysis of coupling of fluid and solid, investigate the reason of invalidation.
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