professional

专业的、专门的

You should seek professional advice before signing the contract.

签约前你应该寻求专业意见。

职业的与业余相对

She turned professional at the age of seventeen.

她十七岁时转为职业选手。

专业的、内行的

He handled the complaint in a very professional manner.

他以非常专业的态度处理那件客诉。

专业人士、专家

The seminar is aimed at young professionals in finance.

这场研讨会是为金融业的年轻专业人士举办的。

职业选手、职业球员

He played as an amateur for years before becoming a professional.

他当了好几年业余球员才转成职业选手。

行家、高手口语

She fixed the leak in minutes like a real professional.

她几分钟就把漏水修好，真是个行家。