The traditional solvent of static and dynamic problems for stepped prismatic beams is to set up ordinary differential equation in each step and answer it respectively.

阶梯梁静力和动力问题的传统解法是分离变量后分阶梯写出常微分方程并分别求解，不胜其烦。

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Methods Etodolac solid dispersion was prepared with PEG as carrier by solvent-fusion method and identified by differential thermal analysis.

方法选用聚乙二醇为载体，采用溶剂-熔融法制备依托度酸固体分散体，通过差热分析对固体分散体进行鉴定。

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