The equivalent model has good applicability for strong nonlinear Duffing systems.该等效模型对强非线性杜芬系统具有良好的适用性.This paper deals with analytical approximate solutions to the Duffing - Harmonic oscillator by a new method.用一种新方法研究...
The river splits into three smaller streams at this point.这条河在此处分成三条小河.Streams had run dry for the first time in memory.记忆中，小溪第一次干涸了。The firefighters are jetting streams of water at the burning house.消防队员正向燃烧的房屋喷射水注灭火.Go...