These sum problems are all difficult for using elementary method and analysis method, but we can easily solve these sum problems by using the probability method.
而这几个公式的求和问题不论是用初等方法或分析方法都是比较困难的，但用概率的方法却比较容易解决。
For the practical application of enterprise, this article advances a general OLAP modeling tool, and it can solve these problems above efficiently according to the analysis of theory and experiment.
针对企业实际应用，提出了一种通用的OLAP建模工具，理论分析和实验结果表明这种建模工具能有效解决上述问题。
Analysis of the traditional analytical method of nonlinear reinforced concrete structure problems, can only solve some very simple calculation of the structure and components.
传统的解析方法分析钢筋混凝土结构的非线性问题时，只能解决一些非常简单的结构和构件计算问题。
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