forward and reverse短语³⁷³⁷² 基本例句 正反向 The state equations is deduced for the valve con- trolled asymmetrical cylinder system when the cylinder moving forward and reverse, and one nonlinear model is finally integrated. 针对阀控非对称缸系统，分别推导了液压缸正反向运动时的状态方程，并最终统一成一个非线性模型。 cnki