to be upset about something that cannot be changed
変えられないことを嘆いても仕方がない (kaerarenai koto wo nageite mo shikata ga nai)
"There's no use crying over spilled milk."
"覆水盆に返らず。" (Fukusui bon ni kaerazu.)
to make every possible effort to achieve something
a significant discovery or achievement in science or researc...
used to tell someone to be careful and patient
not something one likes or enjoys
to scold someone severely
to test the limits or performance of an AI system
