expert

专家、行家

The museum hired an expert to authenticate the painting.

博物馆请了一位专家来鉴定那幅画。

高手、能手口语

She's an expert at getting cheap flights online.

她是网路上抢便宜机票的高手。

专业的、专家的置于名词前

We sought expert advice before signing the contract.

签约前我们先征询了专业意见。

熟练的、精通的、内行的

He is expert at repairing old clocks by hand.

他很擅长亲手修理老钟。