"in the nutshell" 點解?

In a nutshell 可以解作"總括來講"或"概括".
例子: There's a lot I could say about this movie but to put it in a nutshell, it was terrible.
我對這套電影有許多話想講, 概括說來, 它很糟糕.

一句講哂!

即等於in conclusion，總結是也！