(A possible world W1 is said to be near to another possible world W2 in respect of R to the degree that the same things happen in W1 and W2 in respect of R; the more different something happens in two possible worlds in a certain respect, the "further" they are from one another in that respect.)
（可能世界W1被称为在R方面邻近于另一个可能世界W2，在达到W1和W2在R方面发生同样的事情的程度上；两个可能世界在特定方面上发生的事情差异越“大”，它们相互之间在这个方面就越“远”。