One implication of this rule is that it is impossible to derive a class from itself.
这一规则暗示着不可能从类自身派生出一个类。
Corresponding to the mathematical characteristics of the analytical solution, the physical implication and the fluctuation rule of groundwater level are discussed.
根据解的数学特征，讨论其对应的物理意义和潜水位变动规律。
Corresponding to the mathematical characteristics of the analytical solution, the physical implication and the fluctuation rule of groundwater level are discussed.
根据解的数学特征，讨论其对应的物理意义和潜水位变动规律。
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