It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
It falls on the last day of the lunar year and lasts until the Lantern Festival.
克节从阴历年的最后一天开始一直持续到元宵节。
Bagrit dismissed the idea that computers would learn to 'think' for themselves and would 'rule the world', which people liked to believe in those days.