second-order nonlinear difference equations
二阶非线性差分方程 second-order nonlinear difference equations ; second order nonlinear difference equation ; second order nonlinear difference equations ; second-order nonlinear diff...
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second-order nonlinear difference equations
二阶非线性差分方程
以上为机器翻译结果，长、整句建议使用 人工翻译 。