differential equation of two-order的用法和样例：
例句
- This paper studies the existence of monotone positive solutions to a type of three point boundary value problems of nonlinear second-order differential equations.
摘要利用范数形式的锥上不动点定理，研究了一类二阶微分方程三点边值问题单调正解的存在性。 - The secondorder differential diagram of RCG is analyged and the corresponding skipsearch algorithm is presented.
对心阻抗二阶微分图剖析并提出相应的跳跃搜索算法。
