unprofessional

1. ADJ If you use unprofessional to describe someone's behaviour at work, you are criticizing them for not behaving according to the standards that are expected of a person in their profession. 不專業的; (工作中的行爲) 未達到專業標準的[表不滿]

He was fired for unprofessional conduct. 他因不專業的操作而被解雇。