The causal explanation of a regularity, described by a universal law, is somewhat different from that of a singular event. 对普遍规律所描述的规律性给予因果解释和对单个事件的解释有所不同。
That is, I should never act in such a way that I could not also will that my maxim should be a universal law. 这就是说,除非我愿意使自己的准则成为普遍规律,我绝对不应该采取行动。