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...
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And the mathematics of that equation involved a double derivative in time of x 0 plus some constant times x equals zero with some constraints on it.
那个数学方程式,包括了x对时间的二阶导数,加上常数乘以x等于,还有一些限制条件。
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