本文对化学教学中的物质的量和反应进度的概念和应用进行了讨论，并对它们之间的联系和区别进行了辨析。
In this paper, the concepts and the applications of amount of substance and extent of reaction have been discussed.
本文广义地讨论了滴定分析的可行性界限，并借助平衡反应进度概念导出了滴定分析可行性界限的普适判别式。
The paper widely discusses the limit of feasibility in titrimetry and has derived the general criterion formula of the limit of feasibility in titrimetry by extent of reaction at equilibrium.
本文广义地讨论了滴定分析的可行性界限，并借助平衡反应进度概念导出了滴定分析可行性界限的普适判别式。
The paper widely discusses the limit of feasibility in titrimetry and has derived the general criterion formula of the limit of feasibility in titrimetry by extent of reaction at equilibrium.
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