direction changing

The direction of the wind is constantly changing.

风向不断变化。

The spiral cloud and rain band of typhoon, whose origination and maintain can be explained with the vortex Rossby-wave theory and can produce "local vortex Rossby-wave" through changing gradient distribution pattern of local relative vorticity along outward direction of typhoon.

台风螺旋云雨带的形成与维持，可以用涡旋Rossby波理论来解释：可以通过改变局地相对涡度径向梯度分布，从而沿台风径向激发出局地涡旋Rossby波。

The establishment of the mathematical model for direction changing broken line sections with a discussion of the construction method

变方向折线剖面数学模型的建立及作图方法讨论

The water onflow can be made by the direction changing and rib like spirals guide, it can strength the ability of heat absorption.

水在特殊结构内的改向和模肋式螺旋导向促成水的湍流，加大了吸收热量的能力。

Concepts of proportion vary with each new fashion direction, changing with the evolution in silhouette and line.

比例均衡的概念因每一新的流行趋势而异，且随廓形和线条的演变而变化。