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

• 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。
• 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。
• 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。
• 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。
• That is how we get the tangent plane.
  这样我们就得到了切平面。
• 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。
• 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。
• The tangent is an important concept in trigonometry.
  “正切”是三角学中的一个重要概念。
• It's going to be tangent to the level surface, right?
  它是与等值面相切的，对不对？
• 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。