tangent

noun

1. 切线
   a straight line that touches the outside of a curve but does not cross it
2. 正切
   the ratio of the length of the side opposite an angle in a right-angled triangle to the length of the side next to it

1. 切线
   A tangent is a line that touches the edge of a curve or circle at one point, but does not cross it.
2. PHRASE 突然偏离原来的思路;突然离题
   If someone goes off at a tangent, they start saying or doing something that is not directly connected with what they were saying or doing before.
   1. The conversation went off at a tangent.
      交谈突然偏离了正题。

1. The conversation went off at a tangent.
   交谈突然偏离了正题。
2. These two curves are tangent.
   这两个弧相切。
3. For? 0 we naturally get a circle; for? 0 we obtain two tangent circles.
   对？0我们当然得到一个圆；对？0得到两个相切的圆。
4. Drag to add two arcs with adjustable radii and connecting tangent lines.
   拖动此形状，可添加具有可调半径和相连切线的两条弧线。
5. That's the equation of a tangent plane.
   这就是切平面的方程。
6. Drag to add 2 circles with tangent connecting opposite sides. Complementary tangent line can be shown.
   拖动此形状，可添加切线与相对圆边相连的两个圆。可以显示互补的切线。
7. But, actually, that is not true because here the circle is tangent to the axis.
   但实际上，这是不对的，因为这个圆与这个坐标轴相切。
8. The steady automatic tangent line function has improved working efficiency.
   稳定的自动切线功能提高了工作效率。
9. The first two order radial and tangent displacement modes of pipe are acquired.
   对管道进行数值模拟，提取前两阶径向和切向位移模态。
10. A new spline curve is presented which interpolates given points and tangent directions with piecewise involute of circle.
    利用拼接的圆渐开线实现对平面上的数据点及其切向的插值。
11. The plane that contains all the lines tangent to a specific point on a surface.
    包含所有在表面上的一个特殊的点相切的线的平面。
12. This paper discusses cubic algebraic curves with the given tangent polygon.
    文章论述了与给定切线多边形相切的三次代数曲线；
13. That is how we get the tangent plane.
    这样我们就得到了切平面。
14. Then, if I choose any vector in that tangent plane.
    那么如果我选择了任何位于切平面的向量。
15. And, that's the same thing& as being tangent to the level.
    这就和“与等值面相切”说的一样了。
16. Returns the hyperbolic tangent of the specified angle.
    返回指定角度的双曲正切值。
17. Finally, we illustrate the effects of using the tension parameter and tangent vectors to generate subdivision curves.
    最后给出一些实例来说明松弛参数和切向量对细分曲线的影响。
18. Describes the tangent when approaching this point from the previous point in the curve.
    在曲线上从上一个点接近这个点时描述切线。
19. The tangent is an important concept in trigonometry.
    “正切”是三角学中的一个重要概念。
20. Being perpendicular to the surface means that you are perpendicular to its tangent plane.
    垂直于曲面也意味着垂直于它的切平面，垂直于曲面也意味着垂直于它的切平面。
21. The line connecting the point and the center bisects the included angle of the two tangent lines.
    这一点和圆心的连线平分这两条切线的夹角。
22. It's going to be tangent to the level surface, right?
    它是与等值面相切的，对不对？
23. If we were moving on the tangent plane, this would be an actual equality.
    如果我们在切平面上移动，这将会是一个真正的等式。
24. Accurate reconstruction of planar contour mixed with straight lines and arcs is achieved with position or tangent continuity.
    解决了由直线和圆弧构成的平面轮廓精确重构问题，满足轮廓各段之间位置连续以及相切条件。
25. Given the algorithm for solving common tangent ball mechanism and network search algorithms.
    给出了求解公切线的算法和网络搜索球机制的算法。
26. Let's think about the tangent plane with regard to a function f.
    我们来考虑，关于函数f的一个切平面。
27. That's one way to define the tangent plane.
    这是定义切平面的方法。
28. The atanh() function returns the inverse hyperbolic tangent of an angle.
    函数的作用是：返回一个指定角度参数所对应的反双曲正切值。
29. We are replacing the graph by its tangent plane.
    我们用函数的切平面来替代它的图像。
30. So, the velocity vector is going to be always tangent to the curve.
    速度向量总是与曲线相切的。

n.

fly/go off at a tangent

• 突然转换话题；突然改变行动
  to suddenly start saying or doing sth that does not seem to be connected to what has gone before

noun

1. ratio of the opposite to the adjacent side of a right-angled triangle

   Synonym:    tan

2. a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point