That leads to biquadratic equations for solution.它们又引出待解的双二次方程.The global topological structure of the biquadratic systems is discussed and their coefficient conditions are given.讨论了一类齐四次系统的全局结构,并给出了它们的系数条件.In this paper...
The emptiness here sent shivers down my spine.这里的空寂让我脊梁骨发凉。The accident gave me the shivers.这事故使我不寒而栗.The shriek sent shivers ( up and ) down my spine.那尖叫声使我的背脊起了一阵寒 颤....