n.专家；能手
adj.熟练的；内行的
According to expert opinions, they gave up the experiment immediately. 根据专家们的意见，他们马上放弃了这项试验。
He is an expert in unarmed combat. 他是徒手格斗的能手。
用作形容词 (adj.)The surgeon cut away the tumour with expert skill. 外科大夫用熟练的技术把肿瘤切去。
To her expert eye, the painting was terrible. 她以内行的眼光看，这幅画糟透了。
Could you give me your expert advice? 你可以给我一些专业意见吗?
当expert作为形容词的时候，后面常接介词at或者in。 He is expert at/in painting.他的专长是画画。
当expert用于名词后的时候，后面可接介词on，at或in。 He is an expert on/at/in lung diseases.他是肺部疾病方面的专家。
