科幻作品中的「预言」有哪些科幻作品里的设定已经实现或者很有可能实现？Having this even further, my see is the fact "at" need to be used for events that are not days on the week (at Xmas, at Easter, in the weekend, at lunchtime, at 9 o'clock) irrelevant of size, and "on" in which time is per day in the 7 days (on Satu