One can also imagine changing the orientation of the source or drain with a magnetic field, introducing an additional type of control that is not possible with a conventional FET: logic gates whose functions can be changed on the fly.

• 想像一下，如果可以利用磁场来改变源极与汲极的磁性方向，这就等于引进了一种新的控制方法，可以制造出运作时能切换功能的逻辑闸，这是传统FET办不到的。