2/3的候选人未能通过这第一关，被打发回家了。
Two-thirds of candidates fail at this first hurdle and are sent home.
它发回了许多月球背面的照片，并被用来进行一些科学实验。
It has sent back many photos of the far side of the moon and has been used to carry out some scientific experiments.
1977年发射的“旅行者一号”太空探测器发回了木星和土星的壮观图像，然后飞出太阳系，执行前往恒星的单程任务。
The space probe, Voyager I, launched in 1977, had sent back spectacular images of Jupiter and Saturn and then soared out of the Solar System on a one-way mission to the stars.
应用推荐