PHRASE
概括地說;簡言之
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...
簡而言之，業主們認為自己最了解情況。
This, in a nutshell, is what Richard Chaplin appears to have done.
簡言之，這好像就是理查德·查普林所做的一切。