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SI    音标拼音: [s'i]
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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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英文字典中文字典相关资料:


  • Sports Illustrated
    Sports Illustrated, SI com provides sports news, expert analysis, highlights, stats and scores for the NFL, NBA, MLB, NHL, college football, soccer, fantasy, gambling and more
  • 国际单位制 - 维基百科,自由的百科全书
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    公制是最早于法国大革命时期所采用的十进制单位系统,而国际单位制则是在公制基础上发展起来的单位制,于1960年第十一届国际计量大会通过并正式发布,推荐各国采用,其国际简称为SI。
  • SI Units | NIST
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  • Swedish Institute
    SI conducts Leadership Programmes for decision makers and opinion makers with the goal to strengthen the work of sustainable development in the participants' own countries
  • Smithsonian Institution | Home
    The Smithsonian Institution is the world's largest museum, education, and research complex Our stories, collections, and research span the arts, sciences, and humanities Explore, learn, and be inspired—wherever you are! Start exploring
  • si拼音_si的一二三四声汉字 - 康熙字典
    si拼音的字,si拼音一到四声所有汉字一共有196个,si拼音的字包括有思、丝、楒、嗣、偲、四、似、姒、巳、锶、食、斯、肆、司、禠、寺、驷、俟、私、伺、榹、泤、蕼、貄、媤、禗、汜、厮、蕬、泗、佀、泀、澌、牭、梩、価、撕、愢、洍、凘、俬、恖、蛳
  • SI Digital Framework
    This service constitutes the authoritative digital reference for the International System of Units (SI) It provides Permanent Digital Identifiers (PIDs) for the named SI units, SI prefixes, and defining constants, and a parsing tool for the PID and semantic model for compound units





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