base unit
名词 n.
英文释义
名词 n.
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A unit of measurement which is not itself defined in terms of other units, and from which other units may be derived.
— The SI unit of velocity is metres per second, derived from the base units metre and second.
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The main unit of a computer or hi-fi system.
— When upgrading her computer she bought a new base unit but kept the screen, keyboard and mouse.
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数据来源: Wiktionary