tangent

英 [ˈtændʒənt]

美 [ˈtændʒənt]

n.  切线; 正切

复数：tangents　

TEM8

BNC.21952 / COCA.24421

习惯用语

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

牛津词典

noun

• 切线
  a straight line that touches the outside of a curve but does not cross it
• 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

柯林斯词典

• 切线
  Atangentis a line that touches the edge of a curve or circle at one point, but does not cross it.
• PHRASE 突然偏离原来的思路;突然离题
  If someonegoes 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。

英英释义

noun

• ratio of the opposite to the adjacent side of a right-angled triangle
  Synonym:tan
• a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point

双语例句

• That's the equation of a tangent plane.
  这就是切平面的方程。
• That's one way to define the tangent plane.
  这是定义切平面的方法。
• The tangent is an important concept in trigonometry.
  “正切”是三角学中的一个重要概念。
• 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。
• It's going to be tangent to the level surface, right?
  它是与等值面相切的，对不对？
• 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。
• That is how we get the tangent plane.
  这样我们就得到了切平面。
• 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。
• 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。
• Returns the hyperbolic tangent of the specified angle.
  返回指定角度的双曲正切值。