英语语法分析

Helicity depicts dynamic feature of fluid that is rotating while moving along the rotating direction.

螺旋度是表征流体边旋转边沿旋转方向运动的动力性质的物理量。

The evolution of vertical helicity has a better forecast instruction significance to the southwest vortex rainstorm.

垂直螺旋度的演变对本次西南涡暴雨有较好预报指示意义。

It is difficult for the application of relative storm helicity in predicting storms for the uncertainty of storm velocity.

风暴相对螺旋度用于预报时计算的难点在于确定预报风暴移动速度。