Today, 35 percent of Americans practice cognitively demanding professions, not only to the professions proper like lawyer or doctor or scientist or lecturer, but many, many sub-professions having to do with being a technician, a computer programmer.
而今天，35%的美国人 是专业从业者。 不仅有像律师这样的专门职业， 或者医生，科学家，讲师， 而且有很多很多细分的专业 需要技术员， 计算机程序员来做。