tangent [ˈtændʒənt]

例句:

• The radiation is emitted tangent to these trajectories.
  来自Scientific American
• The conversation went off at a tangent.
  交谈突然偏离了正题。
  
• The graph of a concave function is always below its tangent.
  一个凹函数的图象总在它的切线的下方.
  
• The tangent may be used to find the direction.
  这方向也可用正切求得.
  
• That's where he and I get off on a tangent.
  来自NEWYORKER
• From there, we went down the tangent of summer fruits.
  来自THETIMES