SI system是什么意思 SI system怎么读
SI system的英文翻译是什么意思，词典释义与在线翻译
Noun:- 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"
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