| 1. | One such surface is known as the pseudosphere .
一个这样的曲面名为伪球面。 |
| 2. | Lines pierce the sphere in points .
直线与球面相交为点。 |
| 3. | Many engineers shy away from spherical projection methods .
许多工程师对球面投影法有畏难情绪。 |
| 4. | Successive wave fronts in this case form a series of concentric spheres .
相继波前形成了一系列的同心球面。 |
| 5. | One highly successful approach utilizes a triplet aspheric lens array .
一种很成功的方法是利用一个三合非球面透镜阵列。 |
| 6. | We say that a caustic is formed on the surface of the sphere at this distance .
我们说，在这一距离的球面上形成了焦散。 |
| 7. | An equation for finding the center of gravity of an area can be derived from fig. 1-3 .
由图1-3可以得到球面积重心的公式。 |
| 8. | What changes are necessary when a spherical curvature is introduced in the substrate ?
当一个球面曲率引入基底时需要有什么改变？ |
| 9. | The aim of this chapter is to provide a brief survey of the fundamentals of spherical astronomy .
本章将简述球面天文学的基本知识。 |
| 10. | Hence a full subshell has zero angular momentum and is spherically symmetric .
于是，一个已经填满的支壳层的角动量为零，并且是球面对称的。 |
