中文摘要：

采用待定系数法,给出了非齐次项为n次一元多项式的三维二阶常系数线性微分方程组的特解公式,并通过举例验证了特解公式的正确性.

英文摘要：

By applying the method of undetermined coefficients,this paper is devoted to finding a particular solution for a kind of systems of three-dimensional second-order differential equations with constant coefficients.By an example,the particular solution formulas are obtained.