However, as to the para-varicose disturbance, the gas rotation is a negative factor to the instability of symmetric mode, while it is a strong positive factor to the instability of asymmetric mode.
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- 对于对称模式,气体旋转运动是低阶模式扰动的促稳因素,然而却是高阶模式扰动的强烈的失稳因素。