直角

• Let ∠ abc be an angle of ninety degrees .
  假设ABC为直角。
• It forms a right angle with the equator .
  它与赤道成直角。
• One line cuts another at right angels .
  两线相交成直角。
• The equations are written in rectangular coordinates .
  这些方程是在直角座标系中写出的。
• An axial electron pair meets at right angles with 3 neighboring pairs .
  轴向电子对与三个相邻的电子对相交成直角。
• The upper and lower jaws possess straight tooth rows and the jaw arches are almost rectangular in shape .
  上、下颌具有直的齿列，而颌弓几乎呈直角形。
• The two vanes are at right angles in plan, and each is either all shaded or all in sunlight .
  上、下两块觇板在一平面图上相交成直角，每块觇板全是阴暗的，或全被阳光照射。
• Bisecting that at right angles , is lundy on that side
  平分那个直角,朗迪在这边
• Right angle parting - off tools with high speed steel tips
  带高速钢刀头直角切断刀
• A square has four equal sides and four right angles
  正方形有四条等边和四个直角