in short idiom
C1 简而言之，总之
used before describing something or someone in as few words and as directly as possible
He's disorganized, inefficient, never there when you want him - in short, the man's a pain. 他这个人既没有条理，又没有效率，你需要他的时候他从来不在——简而言之，这个人就是个讨厌鬼。