To take an extreme example, imagine that an electron does not scatter in an iron layer unless its spin points in the same direction as the layer's magnetization.
举一个极端的例子，假设一个电子没有在一个铁层散射，除非与层的磁化方向相同地旋转。
2
Dreams are usually contrary to the facts, which coincide with the philosophy that things will develop in the opposite direction when they become extreme.
梦通常与事实相反，这正好与物极必反的哲学思想相吻合。
3
Such is the nature of the swing of the poles and to the degree it is extreme in one direction so it also will become in the other.