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以上来源于: WordNet
In the case of plane motion, the phase plane method can be used to analyse the motion qualitatively.
对于平面运动的特殊情形，可在相平面内进行定性分析。
The stability of the helical equilibrium is analyzed with phase plane method, and an analytical criterion of stability is revealed.
用相平面法分析螺旋线平衡的稳定性，导出解析形式的稳定性条件。
The first one is about how to build the connection between describing function method and phase plane method through limit cycle analysis.
第一个是关于如何通过极限环分析建立描述函数法与相平面法之间联系；
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