cyclonic flow-shear line 气旋性切变线
The fact that the vortex-shaped area in the velocity map had a continuous mesoscale cyclonic flow indicates that the severe storm was a supercell storm.
速度图上涡旋状回波区对应着连续出现中气旋的现象，说明强风暴单体为具有涡旋形态的超级单体；
The interaction among the shearing basic flow, cyclonic vortex, and multiple vorticity lumps can change the tendency.
切变基流、低涡和多个涡块的相互作用，可以改变下降的趋势。
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