The units painted on the dial of a scale are often mass units, not force units.

秤的刻度盘上所标单位是质量的单位，而不是力的单位。

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These abilities are based on the regular and irregular assembly of basic mass units in the microscales.

而这些功能的实现，往往要依靠基本物质单元在微尺度上的有序或无序组装。

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The average mass of an atom of an element, usually expressed relative to the mass of carbon 12, which is assigned 12 atomic mass units.

一种元素中原子的平均重量，通常相对碳12的重量来表示，碳12的重量定为十二个原子量单位。

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This is 12.011 grams per mole or 12.011 atomic mass units,AMU.

这是12。011克每摩尔,或者12。011原子质量单位。

麻省理工公开课 - 固态化学导论课程节选

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