When the world changes unpredictably over the course of centuries, no one is shocked: Who blames the Roman centurions for not foreseeing the invention of rocket launchers?

• 当世界在几百年的光阴内有无法预期的改变时，没有人会感到震惊：谁会责怪罗马的百夫长无法预见火箭发射台的发明呢？