| 1. | Let ∠ abc be an angle of ninety degrees .
假设ABC为直角。 |
| 2. | It forms a right angle with the equator .
它与赤道成直角。 |
| 3. | One line cuts another at right angels .
两线相交成直角。 |
| 4. | The equations are written in rectangular coordinates .
这些方程是在直角座标系中写出的。 |
| 5. | 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。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | Bisecting that at right angles , is lundy on that side
平分那个直角,朗迪在这边 |
| 9. | Right angle parting - off tools with high speed steel tips
带高速钢刀头直角切断刀 |
| 10. | A square has four equal sides and four right angles
正方形有四条等边和四个直角 |
