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domaindo·main AW /doʊˈmeɪn / noun [countable] - an area of knowledge or activity（知识或活动的）领域◆I don't know the answer – that's really outside my domain.我不知道答案，这确实超出了我的知识范围。◆This issue is now in the public domain (= the public knows about it).这个问题现在已经人所共知了。
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computing计算机) a set of Internet addresses which end with the same group of letters域；定义域◆I can't remember his whole e-mail address, but the domain name is “osu.edu.”我记不全他的电邮地址，但域名是 osu.edu。
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mathematics数学) the range of possible values of a particular variable (= a quantity which can vary) 区域；定义域
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