An expert is someone who knows some of the worst mistakes that can be made in his subject and how to avoid them.

An expert is someone who knows some of the worst mistakes that can be made in his subject and how to avoid them.

专家是知道在他的专业中可能会犯的一些最严重的错误以及如何避免这些错误的人。

-- Werner Heisenberg 海森堡