Whether a leaf falls to the earth or not, or a fish swims up or down, or a proton rotates to the left or to the right - these trifling differences have precisely the same result.

• 叶子是否落到地上,或者鱼游泳是向上还是向下,或者氢核转动到左边还是右边-这些微不足道的区别精确地有同一个结果。