| 1. | A single reflection will often split .
单个反射波常分叉。 |
| 2. | The spacing of reflections is of more doubtful reliability .
反射波系的间隔不是很可靠的。 |
| 3. | The second is the sequence of the reflections and their spacing .
第二个是这个反射波系及其间隔。 |
| 4. | The reflected wavefront arrives at the point x at time t=(2l－x)/c .
反射波前在t2Lxc时到达X点。 |
| 5. | Instead, most of the incoming energy reappears as the reflected wave .
相反，大部分入射能量都重现为反射波。 |
| 6. | The first conspicuous sag in a reflection occurs at about 1. 1s .
在大约11秒的一个反射波出现了第一次明显的时间滞。 |
| 7. | A detector at b will then record the time of arrival of the reflected wave .
于是在B点的检波器将记出反射波到达的时刻。 |
| 8. | It is rare that salt dome surface itself yields a clearly defined reflection .
盐丘表面本身产生明显反射波的情况，并不多见。 |
| 9. | Depths below datum are calculated from the corrected reflection times .
基准面以下的深度，需要根据作过校正的反射波时间来计算。 |
| 10. | The reflections are recorded by detecting instruments responsive to ground motion .
反射波由对地面振动极敏感的探测仪器记录下来。 |
