2. Wind whistles through my helmet, then we're aboard the Phoenix and launching upwards in a swirl of leaves, grass and dust. 转动口哨穿越我的钢盔，然后我们搭乘凤凰城而且以上在树叶，草和灰尘的一个漩涡方面发射。
3. This paper discusses the separation principle of toroidal swirl separator, and deducts the movement rule of granule in the separator and the critical particle diameter. 本文探讨性的论述了旋流分离器的分离机理，推导出了颗粒在旋流器内的运动规律和被分离的临界粒径。
英英解释
n.
1. the shape of something rotating rapidly
2. turn in a twisting or spinning motion
3. flow in a circular current, of liquids
