Englishfor English speakers
specialist
Noun
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A specialist is a person who is highly skilled in one type of activity or study.
His army training had made him a bomb disposal specialist.
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A specialist is a doctor who is skilled in treating one part of the body.
It hurt so much when she swallowed food that she was sent to a throat specialist.
field
Noun
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A field is an open area of land that can be used for many different things, from sports to crop-growing.
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A field is an area of study or work.
He was an expert in the field of American history.
field
Verb
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If you field something, you answer it; you address it.
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If you field the team, you place them in the game.