椭圆的

Employing the bidimensional regression along with standard deviational ellipse, the authors compared the local and global distortions between two kinds of cognitive maps.

在此基础上，通过二维回归与误差椭圆的方法分别对两种外部化方法获得的结果进行全局与局部的比较，研究发现手绘草图的方法的结果更加符合实际地图；然而两个方法在变形的趋势上却大致相同。

In order to recognize the 2D shapes, we proposed a set of perspective invariants of a pair of coplanar conics in this paper, we suggest a perspective invariant representation of general planar curve based on ellipse, and give an algorithm using the invariants and the representation to recognize 2D shapes.

为了实现二维形状的透视投影不变性识别，本文推导出了一种共面二次曲线对的透视投影不变量，提出了一种基于椭圆的平面曲线的透视不变性表示方法，并且给出了用该不变量和不变性表示方法实现二维形状识别的算法。

We investigate similar questions for other elliptic operators, such as the Schrodinger operator, non homogeneous membranes, or the bi-Laplacian, and we look at optimal composites and optimal insulation problems in terms of eigenvalues.

我们对相似的问题进行其他椭圆的操作者的研究，例如薛定鄂算子，非同类的膜或者双Laplacian，并且我们就eigenvalues而言看最佳的混合物和最佳的绝缘问题。

When Jujube tree leaves start to fall and the Jujube fruits turn red, northwesterly wind is about to come, which turns the north into a sandy and dusty world.

象橄榄又象鸽蛋似的这枣子颗儿，在小椭圆的细叶中间，显出淡绿微黄的颜色的时候，正是秋的全盛时期；等枣树叶落，枣子红完，西北风就要来了。

Some were oblong, some rounds, some triangular ,and some square.

有些是椭圆的，有些是圆形的，有些是三角形的，而有些是正方形的

Introduced the linear uncertainty propagator and derived how one finds the directions at initial time that evolve into the directions of the principal axes of the final time ellipse, and proved that the initial time directions form an orthonormal basis.

介绍线性不确定传播子，推导其如何得到起始时刻的方向，并且这个方向会演变成最终时刻椭圆的主要轴的方向。证明起始时刻的方向构成了标准正交基底。

The background of the photograph is often dark, displayed in a round or oval frame, resembling a miniature or a scene witnessed through a peep-hole or key hole.

图片的背景通常很暗，在一具圆的或椭圆的框了内，好像一个缩小的影像，或者是通过门锁的洞看到的场景。

My vagina is a shell, a round pink tender shell opening and closing, closing and opening.

我的阴道是个贝壳，一个椭圆的、粉红的、细嫩的贝壳，开了又合，合了又开。

The clippings, or sarments, were of no agricultural use, too fibrous to rot into the ground during the winter, and too numerous to leave piled in the corridors between the vines where the tractors would pass.

他把100公升装的油桶拦腰切断，架在一个狭窄的铁管上；又在前面装上一只已经变形成椭圆的旧车轮，在后面加装上两只长度不一的把手，便形成了一辆独轮手推车。

The most recognisable type is the returning boomerang, which is a throwing stick that travels in a elliptical path and returns to its point of origin when thrown correctly.

有多种形状。最常见的就是能返回的，它以类似椭圆的轨迹进行飞行，并返回到最初的投掷点。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。