你知我知 ? Did you know that I know 二阶方程 ? Second-order equation 表11 种薯切面朝向及化肥施用方式对马铃薯出苗的影响试验出苗率 ? Table 11 seed potato slices and chemical fertilizer applic...
The dynamics of leaf area accorded with the curves of second-orderequation.
叶面积消长动态符合一元二次方程变化曲线；
2
It's a second-orderequation 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。
3
By using a fixed point theorem in cones, we investigate a second-orderequation and the theorem of existence of unique positive periodic solution is given.