他关了与法院广场相切的那条街上的办公室门，走过了两条街回到家。
He closed his office on the street tangential to the courthouse square and walked the two blocks to his house..
如果两个等高线相切，说明它们的切线相同，也就是说他们的法向量应该平行，我再在这里画个图。
If the two level curves are tangent to each other that means they have the same tangent line. That means that the normal vectors should be parallel. Let me maybe draw a picture here.
例如，在某些情况下，如果已知向量场与曲线相切，或者内积是一个常数等等，那么结果将会很简单。
And, in some cases, for example, if you know that the vector field is tangent to the curve or if a dot product is constant or things like that then that might actually give you a very easy answer.
速度向量总是与曲线相切的。
So, the velocity vector is going to be always tangent to the curve.
另一种方法是，函数值不变的方向是,是与等值面相切的方向。
The other way to think about it, the direction in which the value doesn't change is a direction that's tangent to the level surface.
只是沿着曲线流动，所以通量为零，F与C相切。
They are just flowing along the circle around and around so the flux will be zero. F now is tangent to c.
这是一个向量场，其中旋转轨道是，以z轴为圆心的圆周，并且这个向量场与每个圆相切。
That is a vector field in which the trajectories are going to be circles centered in the z-axis and our vector field is just going to be tangent to each of these circles.
因为一直到现在我们都是在看图像，而且知道它们，是相切的，但是为什么在一般情况下它们都相切？
Because so far I have shown you pictures and have said see they are tangent.But why is it that they have to be tangent in general?
绿色螺旋线由内部每一个正方形和四分之一圆相切线构成，而红色的螺旋线是黄金螺旋线，它是对数螺旋线的一种特殊类型。
The green spiral is made from quarter-circles tangent to the interior of each square, while the red spiral is a Golden spiral, a special type of logarithmic spiral.
它看上去并不是十分地相切，因为它穿过了曲面。
So, it doesn't look very tangent because it crosses the surface.
但实际上，这是不对的，因为这个圆与这个坐标轴相切。
But, actually, that is not true because here the circle is tangent to the axis.
我们知道梯度向量垂直于这个向量，而速度向量是相切于等值面的，其他相切于等值面的向量，又如何呢？
We know that the gradient is perpendicular to this vector that's tangent to the level surface What about other vectors tangent to the level surface?
一条与曲面相切的直线。
它是与等值面相切的，对不对？
我们做过若干次了，沿着圆，向量场与圆相切。
If you remember what we did several times, well, along the circle that vector field now is tangent to the circle.
特别地，有一种简单的情况，是不用计算的，当向量场与曲面相切，没有通量。
In particular, an easy case where you know you can get away without computing anything is, of course, if your vector field is tangent to the surface because then you know that there is no flux.
创建表面使用扫描第2轨与相切选项。为了实现切线选项，您将必须建设中的表面部分。
Create the surface using sweep 2 rails with the tangency option on. To achieve tangent option you will have to build the surface in parts.
相切(Tangential)连续性[c 1or g 1]则是下一个层次，指的是建立一个连接这些表面间的平滑的圆弧过渡。
Tangential continuity [C1 or G1] is the next level, defined by a circular arc creating a relatively smooth transition between these surfaces.
α角将,与该点相切。
最终得到的角色的相切空间的法线贴图。
这条线和这个圆相切。
包含所有在表面上的一个特殊的点相切的线的平面。
The plane that contains all the lines tangent to a specific point on a surface.
利用拉格朗日乘子法求解二次曲线和二次曲面之间的最小距离，给出了曲线与曲面相切的条件。
With the Lagrange multiplier method, the minimum distance of the center of a circle and a quadric surface was provided and the tangency condition of curve and surface was given.
由切应力互等定理可知，在截面边缘上各点处切应力方向必与圆周相切。
Based on shearing stress Theorem, we know that the shearing stress direction of all the spots on the edge of circular cross-section should be tangent to the circle.
对？0我们当然得到一个圆；对？ 0得到两个相切的圆。
For? 0 we naturally get a circle; for? 0 we obtain two tangent circles.
一些例子所给予者和限制各界的多边形，线相交和相切的圆锥部分，帕普斯和墨涅拉俄斯配置的点和线。
Some examples are given by inscribed and circumscribed circles of polygons, lines intersecting and tangent to conic sections, the Pappus and Menelaus configurations of points and lines.
访问是相切的曲线和空间是指内地，而“公共空间的客厅”，是透明的，看到外面的灌木丛，以查看。
The access is tangent to the curve and the Spaces refer to the interior, while the "public space" of the living room, being transparent, sees outside with a view to the thicket.
并给出了非接触式、浅近切割式及相切式牛顿环的统一的光程差，牛顿环半径及凸透镜曲率半径测量公式。
And give out the unified optical path, Newton's ring radius and convex lens curvature radius measurement formula of non - contact type, simple cutting type and tangent type Newton's Rring.
并给出了非接触式、浅近切割式及相切式牛顿环的统一的光程差，牛顿环半径及凸透镜曲率半径测量公式。
And give out the unified optical path, Newton's ring radius and convex lens curvature radius measurement formula of non - contact type, simple cutting type and tangent type Newton's Rring.
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