Senses
专业/ 專業 professional
to be specialized in a particular profession or discipline; professional; specialist
专业/ 專業 major
a special field of study at a university or vocational school; major; discipline; specialty
专业/ 專業 field
a specific branch of business, production, or research; professional field
专业/ 專業 concentrate on
to devote oneself entirely to a specific field of study or business; to specialize in one area (classical)