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单词 SI units
释义

SI units

SI units Système International d’Unités: an international metric system of units used in science and increasingly for commercial purposes. It is based on the seven basic units: metre, kilogram, second, ampere, kelvin, candela, and mole. Derived units with special names include the hertz (frequency), joule (energy), volt (potential), and watt (power). They are used with a standard set of multiples and sub-multiples, including hecto- (× 100), kilo- (× 1000), centi- (× 1/100), and milli- (× 1/1000).

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更新时间:2024/11/14 16:24:54