Because the accretion disk itself is believed to be magnetized, the rotation of the disk can twist the magnetic field lines into a helix.
为我们相信吸积盘本身是被磁化的，圆盘的旋转可将磁力线扭曲成螺旋线圈状。
2
And that slight twist, which creates a double rotation effect when viewed in plan?
轻微扭曲，当你从详图视角看时，会出现一种再次旋转的效果。
3
The sails are mounted at an angle or are given a slight twist, so that the force of wind against them has two components, one of which, in the plane of the sails, causes rotation.