person with special knowledge, skill or training in a particular field
done with, having, or involving great knowledge or skill
"adept in handicrafts"
"an adept juggler"
"an expert job"
"a good mechanic"
"a practiced marksman"
"a proficient engineer"
"a lesser-known but no less skillful composer"
"the effect was achieved by skillful retouching"
"a technical report"
My writing was well known; experts swore that the forgery was by me.
出自： W. Besant
A human relation between the expert and his lay audience must be created.
出自： I. A. Richards
The fitter will rely on keen eyes..and expert knowledge.
The court decides in the end, there are expert witnesses.
A Protestant Militia of 25,000, the most whereof are expert in war.
出自： W. Petty
He is expert at/in painting.
He is an expert on/at/in lung diseases.