They are portions of a sphere, a torus or a cone.
他们是一球形、环形或锥形的一部分。
And, of course, it bounds this disc, but inside of a torus.
显然，它界定了这个圆盘，但是这个圆盘在面包圈的内部。
A torus can be obtained from a rectangle by identifying opposite sides.
环面可由矩形把其两对对边分别重叠起来而得到。
But you can also create a torus or sphere by extruding along a circular path.
但是还可以沿着圆形路径挤压来创建圆环体或球形。
The results show that ATCNTs' energy band structure is relation to torus diameter.
结果表明扶手型碳纳米管环的能谱结构与环的直径有关。
Surfaces are: plane, cylinder, cone, sphere, torus, extruded, revolved, ruled and pipe.
表面有：平面、圆柱、圆锥、球体、圆环、挤压突出、旋转、嵌线和管道。
The grayish structure surrounding the black hole, called a torus, is made up of gas and dust.
而图中环绕黑洞的灰色部分，被称为环体，它们由气体和星尘组成。
Astronomers have long thought that a black hole ought to be surrounded by a torus of dust and gas.
天文学家长期认为黑洞应该是由一环尘埃和气体包围着的。
We study the grid graph and the honeycomb rectanglar torus and honeycomb rhombic torus accordingly.
笔者对格图和环面蜂巢图作了相应的研究。
For bigger robots, he accomplishes this with a series of hoses, arranged like ribs, to form the torus.
他通过一组软管组成肋骨状的圆环体结构来制造大一些的机器人。
First of all, this dissertation extensively studied the algorithms for complete exchange on single-port torus.
本文首先深入研究了单端口环网结构上全交换操作的实现算法。
This paper introduces the combinatorial geometry package CGT with the capability of the torus geometric treatment.
本文介绍了具有椭圆环几何处理能力的组合几何包CGT。
The design represents the torus worm general design process. On the other worm in the design work will have value.
对其他的蜗轮蜗杆的设计工作也有一定的价值。
In this paper, the parametric equation and radiation field formulas for a parabolic torus reflector antenna are given.
本文给出了抛物环面天线的参数方程和辐射场公式。
This paper summarizes our group's work on torus bifurcations and chaos in multi-degree-of-freedom vibro-impact systems.
本文综述了本课组在多自由度碰撞振动系统环面分岔与混沌方面的研究工作。
A new type of multi-folded torus and multi-scroll chaotic generator is studied by constructing a new nonlinear function.
通过构造一个新的非线性函数，研究一类多折叠环面多涡卷混沌产生器。
In this example, the surface is not simply connected and any smoothed-out object looks like a torus with at least one hole.
在这个例子里，圈饼表面就是非单连通的，并且这类物体的简化就会像是至少有一个洞的曲面。
This dissertation gives necessary and sufficient conditions for 2-torus parabolic maps to be invertible, which improves p.
本文首先给出了二维环面上抛物型映射可逆的充分必要条件，完善了P。
The torus curve triangular BEM is put forward to calculate electric field intensity of ring electrodes in 3-d electrostatic fields.
针对高压电力设备中常见的圆环电极表面电场强度的计算问题，提出了圆环面曲边三角形边界元方法。
For plasma torus with elliptical cross-section, a feedback system with conducting shell and active control coils has been suggested.
我们取等离子体截面为椭圆，反馈系统由导壳和主动反馈线圈构成。
The last chapter is the main chapter of this paper, we worked out some result on the tunnels for two bridge knot embedded in solid torus.
第三章为本文的主体部分，给出了实心环体中的一类双桥纽结的隧道的一些结果。
Critical pressures of the cylindrical Shells stiffened by rings with semi-torus section and by circular tube are calculated and compared.
算例表明，在消耗相同材料的情况下，半圆环加肋圆柱壳具有较好的抗水压性能；
Also known as the torus, this large doughnut-shaped structure sits in the centre of the reactor building at a lower level than the reactor.
这个巨大的油炸圈形(圆环形)的构筑物坐落在反应堆建筑的中心，它的标高比反应堆低。
And then we will see that in the framework of diffeomorphism group the symplectic quotient is torus bundle over the moduli space of special submanifold.
然后，我们将看到微分同胚群作用下的辛商为特殊子流形模空间上的以环面为结构群的丛。
And then we will see that in the framework of diffeomorphism group the symplectic quotient is torus bundle over the moduli space of special submanifold.
然后，我们将看到微分同胚群作用下的辛商为特殊子流形模空间上的以环面为结构群的丛。
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