The vortices in the vortex wave flow have particular moving structure, they develop downstream first, stay at the point for a short time, then move upstream.

涡旋波流场中旋涡有其独特的运动规律——先向下游移动，停留很短的时间后，然后向上游移动。

youdao

Spectrum analysis reveals the frequency characteristics of vortex breakdown point oscillation and spiral wave.

频谱分析确定了破裂点脉动和螺旋波的频率特征。

youdao

The results also show that in the intensity evolution and the track change of the cyclonic vortex, nonlinear critical point phenomenon appears obviously.

在低压涡旋强度演化和路径变化的过程中，显示出清楚的临界点现象。

youdao

But before such a intraoffice vortex is created, could we at least ask the question: Does Keller have a point?

FORBES: Does Bill Keller Have A Point About Twitter? Blowback Says "No"