释义 |
SI unit noun[ C ] science specializeduk /ˌesˈaɪ ˌjuː.nɪt/ us /ˌesˈaɪ ˌjuː.nɪt/ a unit of measurement that is part of a system used for scientific and technical work all over the world: 国际标准单位 The SI unit of length is the metre.长度的国际标准单位是米。 SMART Vocabulary: related words and phrases Miscellaneous units of measurement acre acreage caloric denier dioptre farad fathom firkin flashpoint joule kHz MHz newton radian refractive index röntgen Scoville scale sievert sun protection factor watt |