四边形

By cooperating the two-model method with parallelogram frame in this paper, the curve of two crossed cylinders with their axises in a state of vertical can be easily and accurately realized, and the mechanism withdrawn from the method can be applied directly to the hole gas-cutting on high pressure capsules.

文摘：采用双靠模法与平行四边形机构的组合，可简易、准确地实现轴线垂直的两圆柱体相贯线轨迹的复现，其原理可直接用于压力容器上圆孔的气割。

Based on the principle that the damping ratio of hysteretic loop curve for construction was equal to that for test, the hysteretic loop curve was equivalent to a parallelogram composed of two groups of beelines.

该模型在假定构造滞回曲线与实测滞回曲线阻尼比相等的基础上，将土动力滞回曲线等效为由2组直线构成的平行四边形。

The bottom third was a four-sided tapered block, covered with relief sculptures of scenes from Greek history and mythology.

底下第三是一个四边形的砖块，由一些希腊历史神话里的图腾覆盖着

The bottom third was a four-sided tapered block, covered with relief sculptures of scenes from Greek history and mythology.

底下第三是一个四边形的砖块，由一些希腊历史神话里的图腾覆盖着，翻译一句，水平有限，觉得好难哦

The image of picture is trapezoid,the image of the tabletop is a irregular four-sided figure, and the image of the rug is actually three seperate regions with more than 20 different sides.

这个图片框的影象是梯形的，桌面的影象是不规则四边形，而地毯的影象则是被分成超过二十边的多边形。

Applying one of the basic rules of geometry, we know that the sum of the interior angles of a 4-sided polygon is 360 degrees.

通过应用几何学的一个基本规则，我们知道四边形的内角和是360度。

The large diameter jockey pulley housed a spring to move the second parallelogram.

大直径辅轮安置春季动议二平行四边形。

Its accomplishment is simple and intuitional. The main innovation of this method is that we only need construct a symmetric zonal mesh for each interpolated curve respectively and write appropriate knot spacings for mesh edges. Then applying NURCC rules to the initial control polygonal mesh consisting of those symmetric zonal meshes can generate a surface that satisfies interpolation constrains.

该方法的主要创新思想是在被插值曲线的控制多边形两侧构造具有简单对称性质的四边形网格，称为对称网格带，但关键还在于对网格边赋予适当的节点距，并对由这些对称网格带组成的初始控制网格应用非均匀有理Catmull-Clark细分规则，来生成满足插值要求的曲面。

Compared with common quadratic elements, this kind of interpolation method achieves the same accuracy by adding a rotation degree of freedom on every vertex without using midpoints of edges or interior points. Whether consider from the running time or the space that data occupied, this sort of element is more effective than 8-nodes quadrilateral.

和一般的二次单元相比较，这种插值方法不需要使用单元边中点或者内部节点进行插值，仅在每个顶点上增加一个转角自由度就可以得到和二次元相当的精度；无论从运算时间还是数据所占用的空间来考虑，这类单元的计算花费均大大低于八节点四边形二次单元。

Key moras: subaivision surface; auaarilateral grias; parametric; FEM

要害词：细分曲面；四边形网格；参数化；有限元

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。