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单词 Doughnut shape
释义

Doughnut shape

原声例句
英语学习系列1

The octopus has a doughnut shaped brain.

章鱼有一个甜甜圈形状的大脑。

《金融时报》 Podcast

But the fuel, type of hydrogen gas, sits in that doughnut shape.

但是燃料,一种氢气,呈甜甜圈形状。

英语学习系列1

They've got a head in the middle of their body. They've got a doughnut shaped brain.

他们的身体中间有一个头。 他们有一个甜甜圈形状的大脑。

新春菜肴

Shaping the dough into a doughnut shape helps you to get an even rope out of the dough so later when you portion it you can get a nice, even smaller portions out of it, as well.

把面团揉成甜甜圈的形状可以帮你得到一个均匀的条状面团,这样在分面团的时候得到的面团也会更小、更好看。

中文百科

环面 Torus

(重定向自Doughnut shape)
一个环面。
一个环面是两个圆的乘积。
将一个有小洞的环面翻转。

在几何上,一个环面是一个冬甩形状的旋转曲面,由一个圆绕一个和该圆共面的一个轴回转所生成。球面可以视为环面的特殊情况,也就是旋转轴是该圆的直径时。若转轴和圆不相交,圆面中间有一个洞,就像一个甜甜圈,一个呼啦圈,或者一个充了气的轮胎。另一个情况,也就是轴是圆的一根弦的时候,就产生一个挤扁了的球面,就像一个圆的座垫那样。英文Torus曾是拉丁文的这种形状的座垫。

圆环面可以参数式地定义为:

其中

直角坐标系中的关于z-轴方位角对称的环面方程是

该圆环面的表面积和内部体积如下

根据更一般的定义,环面的生成元不必是圆,而可以是椭圆或任何圆锥曲线。

英语百科

Torus 环面

(重定向自Doughnut shape)
A torus
As the distance to the axis of revolution decreases, the ring torus becomes a horn torus, then a spindle torus, and finally degenerates into a sphere.
A torus is the product of two circles, only one of which is shown in this diagram.  The red circle is swept around an axis, which is not shown. R is the radius of the magenta circle; r is the radius of the red one.
R > r: Ring torusR = r: Horn torusR < r: Spindle torusBottom-halves and cross-sections of the three classes

In geometry, a torus (plural tori) is a surface of revolution generated by revolving a circle in three-dimensional space about an axis coplanar with the circle. If the axis of revolution does not touch the circle, the surface has a ring shape and is called a torus of revolution.

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更新时间:2025/6/20 0:52:16