Designed with electronic readout, modular air equipment, and solid state timer. Output of the data is in SI units, Metric, or PSI.

配备有电子读数器，标准空气设备和固态定时器。数据输出采用法制、公制、英制单位。

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At the same time, the practice shows that the accuracy of fundamental si units could be improved further by redefinition of some fundamental physical constants.

同时，实践证明，用固定若干基本物理常数的数值来重新定义基本单位，可以进一步提高基本单位的准确性。

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Units of measure types for the International System of Units (SI).

适用于国际单位系统(si)的度量单位类型。

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And the constant, if we redo it in modern SI units, 1 would take on the value of 1.1 1*10^7m-1 times 10 to the 7th reciprocal meters.

如果我们用现代国际单位制来改写它，这个值是1,1。

麻省理工公开课 - 固态化学导论课程节选

But in terms of SI units, which become much more useful if you're actually trying to use intensity in a problem and cancel out your units, we're just talking about joules per second is what intensity is.

但是用国际单位制，这个变得越来越有用了,如果你实际上在使用强度,来解决问题和约化单位，我们仅仅讨论每秒钟的焦耳,这就是强度。

麻省理工公开课 - 化学原理课程节选

SI units means everything goes in, in SI, everything comes out in SI.

国际单位制单位意味着所有元素进出，都是以国际单位制单位的形式。

麻省理工公开课 - 固态化学导论课程节选