亲爱的读者,也许您在少年时代就从不少传说、童话和其他文学作品中听到和看到古今中外文人描绘的许多神奇、美好的幻想故事。所谓“幻想”,无非是指当时无法实现的遐想和愿望。然而,随着时代的进步,不少幻想却成为后人的向往并为之拼搏的动力,最终变为胜过前人想象的现实。从这个意义上说,科学的幻想往往是现实的前奏。 Dear readers, you may hear and see many magical and beautiful fantasy stories depicted by ancient and modern Chinese and foreign literati from many legends, fairy tales and other literary works during your teenage years. The so-called “fantasy” is nothing more than the delusions and desires that could not be achieved at that time. However, with the progress of the times, many illusions have become the driving force for future generations to strive for and strive to win, and eventually become more realistic than their predecessors. In this sense, scientific illusions are often the prelude to reality.