公切线的英文:
common tangent

common是什么意思
adj. 普通的;一般的;通常的;通俗的;公共的,共有的;共同的
n. 普通;平民;公共地

  • international common
    国际公地
  • Commonness is happiness.
    平凡是福。
  • A common danger causes common action
    同仇敌忾
  • The series uses common components and common interior electronics.
    该系列采用普通的元件和内部电子器件。
  • Common fame is liar
    盛名之下,其实难副
tangent是什么意思
n. 正切;直线区间;突兀的转向;突然转移话题

  • The direction is tangent to the trajectory.
    方向就是轨道的切线方向。
  • The tangent is a relatively important concept in trigonometry.
  • 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。
  • Arrowheads on the lines indicate the direction in which the tangent is to be drawn
    电力线上的箭头表示所要画的切线方向。
  • Don't fly off at a tangent, we are talking about the money problem.
    不要扯别的,我们谈的是那笔钱的问题。

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