Social action unit is not only a quantity concept but also a relation category.
社会行动单位既是一个数量概念，也是一个关系范畴。
The quantifier in Chinese is one part of speech to express the quantity unit.
现代汉语量词是用来表示数量单位的一种词类。
We must use quantity and unit exactly among the field of science and technology.
在科学技术等各领域中必须正确使用量和单位。
The unit of electric quantity is coulomb.
物体的电量单位是库仑。
The unit of electric quantity is coulomb.
物体的电量单位是库仑。
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