在本文提出的这一方法中,利用对一阶微分方程组逐次积分,得到了十分简单有效的近似计算方式。对于经常探讨的九个例题作了试算。在相同的时间步长下,它与文献公布的各种改进型方法的结果相比,精度大致相当或略优。说明这一方法在简单、普适、精确和稳定各方面令人满意。 In this method proposed in this paper, a very simple and effective approximate calculation method is obtained by integrating the first-order differential equations sequentially. A tentative count was made of the nine frequently explored cases. Compared with the results of various improved methods published in the literature, the accuracy is roughly the same or slightly superior at the same time step. It shows that this method is satisfactory in all aspects of simplicity, universality, accuracy and stability.