Someone's speciality is a particular type of work that they do most or do best, or a subject that they know a lot about. 专业; 专长
noun [具体名词] 特色菜，特产；特制品，特需品；专业，专长；医学专科，专外科；常做之事
My speciality is international tax law. 我的专业是国际税法。
