| 1. | A surface can be looked at in two ways .
曲面可以用两种方式验证。 |
| 2. | We call this surface the stress quadric .
我们称这个曲面为应力二次曲面。 |
| 3. | This is known as an isochromatic surface .
这样的曲面称为等色面 |
| 4. | One such surface is known as the pseudosphere .
一个这样的曲面名为伪球面。 |
| 5. | Their study is called the intrinsic geometry of the surface .
它们的研究被称做曲面的内蕴几何。 |
| 6. | The intersection of the q1 and the q2 surfaces, defines a curve .
Q1和q2曲面的交线定义了一条曲线。 |
| 7. | The value of the new coordinate systems and surfaces is twofold .
新坐标系和坐标曲面的价值是双重的。 |
| 8. | The characteristic surface is essentially an acceleration front .
特征曲面实质上是一种加速度波的波阵面。 |
| 9. | Properties of the first kind are called relative properties of the surface .
第一类性质被称做曲面的相关性质。 |
| 10. | In 1728 euler gave differential equations for geodesics on surfaces .
1728年，奥伊勒绘出了曲面上测地线的微方程。 |
