From the return pulse, LOLA determines the time of flight which, accounting for the speed of light, reveals the distance from the spacecraft to the lunar surface.

之后激光高度计将参照光速，计算出反射脉冲的渡越时间，从而获得飞船与月球表面之间的距离。

On November 19, 1969, NASAastronauts Pete Conrad and Alan Bean landed on the Moon, setting their LunarModule (center) down within walking distance of NASA's Surveyor 3 lunar landerprobe.

1969年11月19日，美国宇航员皮特.康拉德(Pete Conrad)和艾伦.宾(Alan Bean)在月球登陆，他们将登月舱(中)停靠在美国宇航局“勘测者3号”(Surveyor 3)月球探测器不远处，然后步行到达了目的地。

Finally standing on the lunar surface, he threw his silver NASA badge into the distance, knowing that the moonwalk had earned him a gold one.

当最终踏上月球表面时，比恩把他的银质NASA（国家航空航天局）徽章远远地抛掉了，因为他知道他在月面上的行走已经为自己赢得了一枚金质的。

By the same method we also obtain the distribution of the lunar zenith distance versus the occurring probability of earthquakes.

同样的方法，可得地震的月球天顶距地震频度分布。