Hurricanes have both a counter clockwise rotation at one level, we call this cyclonic spin and at another level they have a clockwise rotation, known as anti-cyclonic spin.

飓风既层面上是逆针旋的，我们称之为气旋旋，层面上，它又是顺针旋，称为反气旋旋。

When I started to develop my cyclonic vacuum cleaner separation systems, separating dust from air, I went to the experts and they said you'll never make a cyclone that clears dust out of air below 20 microns.

当我开始开发我的旋风吸尘器分离系统，分离空气中的灰尘，我去找专家，他们说你永远制造不出能从空气中清除 20 微米以下灰尘的旋风分离器。