si /ˈsi/
系統資訊程式
Si Mus. A syllable applied, in solmization, to the note B; more recently, to the seventh tone of any major diatonic scale. It was added to Guido's scale by Le Maire about the end of the 17th century.
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SI
n 1: 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 system, International System of
Units, International System]
2: 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 [syn: silicon, atomic
number 14]
3: the syllable naming the seventh (subtonic) note of any
musical scale in solmization [syn: ti, te]