00:04:05,380　　唔　　那任务达成了　　Well, mission accomplished.　　84　　00:04:07,990 --> 00:04:09,650　　让我来解释一下我们在做什么　　Let me explain what we're doing here.　　85　　00:04:09,660 --> 00:04:12,650　　1969年　　阿波罗11号上的宇航员　　Um, in 1969, the astronauts on Apollo 11　　86　　00:04:12,650 --> 00:04:15,960　　在月面安置了数个反射器 而我们则要发射激光　　positioned reflectors on the surface of the moon, and we're going to shoot a laser off　　87　　00:04:15,960 --> 00:04:19,360　　到其中的一个上面并反射回来 到这个光电倍增器上　　one of them and let the light bounce back into this photomultiplier.　　88　　00:04:19,370 --> 00:04:21,200　　哇　　那很酷啊　　Oh! That's very cool.　　89　　00:04:21,640 --> 00:04:22,400　　只有一个问题　　One question.　　90　　00:04:22,880 --> 00:04:25,000" type="audio/mpeg" />-->