In a way that does not meet the standard people expect from someone doing a job — especially a job with training and rules behind it, like a doctor, teacher, lawyer, or nurse. The word covers two rather different complaints, and it helps to keep them apart.

In a way that does not meet the standard people expect from someone doing a job不符合大家對做這份工作的人所期待的標準especially a job with training and rules behind it, like a doctor, teacher, lawyer, or nurse尤其是背後有受訓和規範的工作像醫生、老師、律師或護理師The word covers two rather different complaints這個字涵蓋兩種相當不同的抱怨and it helps to keep them apart把它們分開來看會比較清楚

The first is about MANNERS at work: arriving late, shouting at a customer, posting rude things about your boss online, wearing beach clothes to a meeting. Nobody is hurt, but you look bad and you make your company look bad.

The first is about MANNERS at work第一種是關於工作上的「態度舉止」arriving late, shouting at a customer, posting rude things about your boss online, wearing beach clothes to a meeting遲到、對客人大吼、在網路上發文罵老闆、穿海灘裝去開會Nobody is hurt沒有人受傷but you look bad and you make your company look bad但你自己丟臉也讓公司丟臉

The second is about SKILL and DUTY: a doctor who does not check a patient properly, an accountant who hides a mistake. Here there are real rules, and someone can lose their licence.

The second is about SKILL and DUTY第二種是關於「能力」和「職責」a doctor who does not check a patient properly, an accountant who hides a mistake像沒有仔細檢查病人的醫生、隱瞞錯誤的會計師Here there are real rules這裡有真正的規範and someone can lose their licence而且可能會被吊銷執照

In everyday speech people mostly mean the first one.

In everyday speech在日常說話裡people mostly mean the first one大家大多指的是第一種

You will hear "He behaved unprofessionally" or "The email was written unprofessionally" — it is a serious-sounding word, more formal than "rudely", and it is often chosen exactly because it sounds cool and official instead of angry. Note that it points at the BEHAVIOUR, not the person's ability: you can be a brilliant engineer and still act unprofessionally. There is also a much weaker, non-job use meaning "like an amateur, not neatly made" — "the sign was unprofessionally painted" — but this is less common than the behaviour sense.

You will hear "He behaved unprofessionally" or "The email was written unprofessionally"你會聽到「He behaved unprofessionally」或「The email was written unprofessionally」it is a serious-sounding word, more formal than "rudely"這個字聽起來很嚴肅比rudely更正式and it is often chosen exactly because it sounds cool and official instead of angry而且常常被選用正是因為它聽起來冷靜、官方而不是生氣Note that it points at the BEHAVIOUR, not the person's ability注意它指的是「行為」不是這個人的能力you can be a brilliant engineer and still act unprofessionally你可以是很厲害的工程師卻還是表現得unprofessionallyThere is also a much weaker, non-job use meaning "like an amateur, not neatly made"還有一種弱很多、跟工作無關的用法意思是「像業餘的、做得不整齊」"the sign was unprofessionally painted"像「the sign was unprofessionally painted」but this is less common than the behaviour sense但這比行為的意思少見