PHRASE
概括地说;简言之
You can use in a nutshell to indicate that you are saying something in a very brief way, using few words.
例句
In a nutshell, the owners thought they knew best...
简而言之,业主们认为自己最了解情况。
This, in a nutshell, is what Richard Chaplin appears to have done.
简言之,这好像就是理查德·查普林所做的一切。