Very narrow areas of expertise can be very productive. Develop your own profile. Develop your own niche.

Very narrow areas of expertise can be very productive. Develop your own profile. Develop your own niche.

非常狭窄的专业领域可以非常有效。开发自己的个人资料。开发自己的利基市场。

-- Leigh Steinberg 利·斯坦伯格