算术和初等代数中普通的数通称纯量。
The ordinary numbers of arithmetic and elementary algebra are known as scalars.
文章对统计学中的难点问题算术平均数与调和平均数的关系，特别是其区别做了探讨，找出了区分的较好方法。
This paper demonstrates that the quantitative relationship among arithmetic average, mode and medium, which is widely described by the teaching material of principal of statistics is not correct.
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