国际单位制(SI)是在米制基础上发展起来的一种比较完善而科学的单位制。它的构成严格、合理,含义明确,使用方便。自1960年国际计量大会通过以来,至今为止,至少有60多个国家采用或决定采用,国际性的科技组织也都宣布采用。我国为了积极推行SI,国家计量总局于1979年6月召开了国际单位制工 The International System of Units (SI) is a fairly complete and scientific system of units developed on the basis of the metric system. Its composition is strict, reasonable, meaning is clear, easy to use. Since the adoption of the International Conference on Metrology in 1960, up to now, at least 60 countries have adopted or decided to adopt it, and international scientific and technological organizations have announced their adoption. In order to actively promote the SI in China, the State Bureau of Metrology held its work in the International Unit in June 1979