not known or familiar
不知道的;不熟悉的
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exploration into unknown territory 对未知领域的探索
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his whereabouts are unknown to his family .他的行踪连家人都不知道。
(of a performer or artist)not well known or famous
(演员,艺术家)未被公众承认的;无名的。
an unknown person or thing
未知之人(或物)
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she is a relative unknown .她是一个相对来说不为人所知的人。
【数】 未知数;未知量;未知元
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find the unknown in the following equations .从下列方程式中找出未知数。
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未知的事物
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our fear of the unknown .我们对未知事物的恐惧。
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unknown to without the knowledge of 未被…知晓的