For example, an aerodynamic model might be incompressible thin airfoil theory;

例如，一个空气动力学模型可以是不可压的薄翼理论；

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Based on the piston theory of supersonic flow, the second Lagrange equation is used to set up the dynamic equations of an airfoil with store in the supersonic or hypersonic flow.

基于超音速气动力活塞理论，采用第二类拉格朗日方程建立了带外挂二元翼系统在超音速和超高音速气流作用下的动力学方程。

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Based on the piston theory of supersonic flow, the second Lagrange equation is used to set up the dynamic equations of an airfoil with store in the supersonic or hypersonic flow.

基于超音速气动力活塞理论，采用第二类拉格朗日方程建立了带外挂二元翼系统在超音速和超高音速气流作用下的动力学方程。

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