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SI 音標拼音: [s'i] 系統信息程序 系統資訊程式 Si n 1: a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth' s crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors [ synonym: { silicon}, { Si}, { atomic number 14}] 2: 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" [ synonym: { Systeme International d' Unites}, { Systeme International}, { SI system}, { SI}, { SI unit}, { International System of Units}, { International System}] 3: the syllable naming the seventh ( subtonic) note of any musical scale in solmization [ synonym: { ti}, { te}, { si}] |
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