一所谓宇称守恒定律(law of conservation of parity)乃是建立在右与左的不可辨认的假定上的。它的简单原理,就是说一个实体或事件和它的镜像之间并没有绝对的分别。比如一只右手手套和一只左手手套,两者的确不同,但如果从一面镜子里观察一只右手手套,那么您看见的就是一只左手手套.又如一个搞电学的人,他常常会引用有名的右手定则来说明电磁场的方向。 A so-called law of conservation of parity is based on unidentifiable assumptions about right and left. Its simple principle is that there is no absolute difference between an entity or event and its image. For example, a right-hand glove and a left-hand glove are different, but if you look at a right-hand glove from a mirror, you see a left-handed glove, or another electrician, who often quotes The famous right-hand rule states the direction of the electromagnetic field.