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老鼠笨笨
要看应用的语境，专业，主修用Major, 专业：specialist,expert 等等
易叉叉叨叨
speciality major professional 形容词
shishan786
professional
莫强求Jt
specialty专业be well-versed at擅长
yechenchao77
专业 [词典] major; specialty; profession; [例句]这个系有四个专业。 The department offers four specialities擅长 [词典] be good at; be expert in; be skilled in; be accomplished in; be adept at; [例句]他擅长摄影。He is a good photographer.希望采纳
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