Doctors have to constantly update their knowledge in order to maintain their professional competence.医生必须不断更新知识以保持自己的专业能力。We've always regarded him as a man of integrity and high professional competence.我们一向认为他是个品行端正、专业能力很强的人。Less formally educated people can acquire professional competence.接受的教育不是那么正规的人可以学习专业技能。