A metric system of measurement units based upon the meter (length), gram (weight), second (time) and amperes (electrical current).

基于米(长度)、克(重量)、秒(时间)和安培(电流)的一种测量单位公制系统。

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The International System of Units and other units of measurement adopted by the State shall be the national legal units of measurement.

国际单位制计量单位和国家选定的其他计量单位，为国家法定计量单位。

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Based on this mathematics model, the optimum signal-processing circuit, having high reliability and high stability, is designed and applied to the automatic measurement system of the focusing units.

基于该数学模型，优化设计了高可靠性、高稳定性的信号调理电路，并在聚焦元件自动测量系统中得到了实际应用。

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One, Mars Climate Orbiter, had a particularly humiliating crash, because the fault lay with a group of engineers who, in defiance of common sense, had continued to use imperial units of measurement in their calculations when all around had adopted the metric system.

ECONOMIST: Exploring Mars