At first people refuse to believe that a strange new thing can be done, then they begin to hope it can be done, then they see it can be done—then it is done and all the world wonders why it was not done centuries ago.

起初，人们不肯相信一种奇妙的新事物能够实现；随后，他们开始希望它能实现，接着看见了实现的可能——最终它实现了，全世界反而疑惑，为何几百年前没有做到。