obtuse angles造句

• Use the vector dot product to find the obtuse angle between two diagonals of a cube .
  用矢量点积求立方体的两条对角线所夹的钝角。
• two opposite corners of this rhomb contain three obtuse angles of 101°55'.
  菱面体的两个对顶包含着三个10155'的钝角。
• Above the skin surface, obtuse angle
  表皮上方钝角
• The nano-sized caco3 particles were well dispersed in the pvc matrix, the sharp angles that formed when the pvc molecular chains stressed have an tendency to be changed to the obtuse angles . therefore, the stress concentration could be $
  纳米caco_3粒子在pvc基体中的良好分散，可以使pvc分子链在受力过程中形成的锐角钝化，从而避免应力集中、弥补缺陷，起到增韧增强pvc的作用。