For many years, I conducted courses each season at the Engineers'Club of Philadelphia, and also courses for the New York Chapter of the American Institute of Electrical Engineers. A total of probably more than fifteen hundred engineers have passed through my classes. They came to me because they had finally realized, after years of observation and experience, that the highest-paid personnel in engineering are frequently not those who know the most about
engineering. One can for example, hire mere technical ability in engineering, accountancy, architecture or any other profession at nominal salaries. But the person who has technical knowledge plus the ability to express ideas, to assume leadership, and to arouse enthusiasm among people-that person is headed for higher earning power.
请问本段文字中的One can for example, hire mere technical ability in engineering, accountancy, architecture or any other profession at nominal salaries一句怎么理解？特别是hire与nominal
两词该如何理解？

"One can hire... at nominal salaries" 就是说，任何人可以用一般的薪水雇佣那些人。 Nominal有“有名无实"的意思，就是不是很特别。