单词 | International System of Units, the |
释义 | International System of Units, theInterˌnational ˌSystem of ˈUnits, the science a system of standard measurements based on the metric system, used for measuring distance, weight, time, temperature, electric current, amounts of a substance, and strength of light. There are seven units: the meter, kilogram, second, ampere, kelvin, mole, and candela, which are usually called SI Units. |
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