资料来源 : WordNet®

SI system
     n : a complete metric system of units of measurement for
         scientists; fundamental quantities are length (meter) and
         mass (kilogram) and time (second) and electric current
         (ampere) and temperature (kelvin) and amount of matter
         (mole) and luminous intensity (candela); "Today the
         United States is the only country in the world not
         totally committed to the Systeme International d'Unites"
         [syn: {Systeme International d'Unites}, {Systeme
         International}, {SI}, {International System of Units}, {International
         System}]