A total of probably more than fifteen hundred engineers had finally realized 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？ hire 在此到底是雇用还是出租的意思？

hire还是雇佣的意思。
nominal salary找了一下，最直接的原文解释是:
"Nominal salary" is the salary a member would have received at any time during his/her career if he/she had retained his/her full-time appointment. 就是某个职位（一年内）的固定工资（假设没有奖励或处罚而产生的变化）

至于句子，大概意思是说

雇薪只是来聘用（员工的）专业知识的，（engineering, accountancy之类）而只有具备领导才华的人才有机会获得（比固定工资）更高的收入。（higher earning power）