| 1. | A single cylindrical wavefront impinges on both prisms .
一个圆形波阵面射到两个棱镜上。 |
| 2. | Generally one deals only with a small portion of a wavefront .
一般我们只涉及一个波阵面的一小部分。 |
| 3. | Such wave fronts are separated from one another by one-half wavelength .
这种波阵面彼此间隔半个波长。 |
| 4. | 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。 |
| 5. | The resulting distortions in the wavefront generate the fringe contours .
波阵面上发生的畸变生成了条纹线。 |
| 6. | It starts with zero and grows to a maximum slightly behind the wave front .
它从零值开始，并在稍后于波阵面处增长到最大值。 |
| 7. | The planes of the wave front and the reflecting surface are also normal to the plane of the figure .
波阵面的诸平面与反射面都与图面垂直。 |
| 8. | When the hydrodynamic front reaches the ambient medium it acts like a fast-moving piston .
当流体力学波阵面抵达周围介质时，它像一个运动迅速的活塞。 |
| 9. | The maximum value, i. e. at the blast wave (or shock) front, is called the "peak overpressure. "
位于冲击波波阵面上的最大超压值称为“最高超压力。” |
| 10. | A train of light wave may often be represented more simply by means of rays than by wave fronts .
一列光波往往可以更简单地用光线，而不用波阵面表示。 |
