Remember,however,that as soon as we pass beyond the ______of the moon,a mere quarter-million miles away, we will meet the first of the ______that _______the earth from her widely _______children-----time.
[参考译文]然而不要忘记，我们一旦越过距我们仅25万英里的月球轨道，就将面对把地球与广泛分散在太空中的地球行星分开的第一道屏障----时间。
参考答案：orbit,barriers,separate,scattered.
------------------------------------------------
From a world that has become too small, we are moving out into one _____will be forever large, whose _________will _____from us always more swiftly than we can reach out toward them.
[参考译文]世界已变得非常狭小，当我们走出这个世界时，我们面对的是一片永远大不可及的天地，它的边界总是在急速后退，令我们永远无法触及。
参考答案：that,frontiers,recede.