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二阶方程
1、second───adj.第二（个）的；（比赛、级别上）居第二位的；另外的；次要的；v.支持，附议；临时调派（工作人员等）；n.(Second)（美）塞孔（人名）；num.第二；（规模、质量等）居第二位的；另外的；n.秒；瞬间；第二名；二等品；adv.居第二位；第二，其次
2、equation───n.方程式，等式；相等；[化学]反应式
3、integral equation───[数]积分方程；积分方程（式）
4、cubic equation───[数]三次方程
5、generative equation───生成方程
6、second that───第二个
7、second cousin───n.第二代堂兄妹，第二代表兄妹；远房堂或表兄弟姊妹
8、lam second───林秒
9、order───vi.命令；订货；n.命令；顺序；规则；订单；（生物学）目；vt.命令；整理；订购
1、It's a second-order equation in x, and is a parabola and a parabola has this shape.───这是一个x的二次方程，也是一个抛物线方程式,抛物线都长这样。
2、Positive solution of singular initial value problem of a second order equation───一个二阶奇异初值问题的正解
3、The dynamics of leaf area accorded with the curves of second-order equation.───叶面积消长动态符合一元二次方程变化曲线；
4、Supplementary proof of the special solution of linear second order equation of different system───关于二阶常系数非齐次线性方程特解的补充证明
5、By using a fixed point theorem in cones, we investigate a second-order equation and the theorem of existence of unique positive periodic solution is given.───应用不动点定理，研究了一类二阶时滞微分方程，给出了其唯一周期正解的存在性定理。
1、By using a fixed point theorem in cones, we investigate a second-order equation and the theorem of existence of unique positive periodic solution is given.
2、The dynamics of leaf area accorded with the curves of second-order equation.
3、It's a second-order equation in x, and is a parabola and a parabola has this shape.
4、Well, I have to solve this second-order equation which is something that you've all done in high school and you will find that that's the case when the time is plus two and when the time is plus four.
5、The eigenvalue problem concerns two first-order ordinary differential equations and one second-order equation. Their coefficients depend on physics variables and gradients.