There is clear evidence that the most difficult feeling of all to interpret is bodily pain.

这句中,用of 来表示其前面的事物属于of 后面的 /人群的一部分,
of 是介词,介词短语,可以做定语
of 也是构成所有个的一种形式.of做定语与上面有区别吗？句法功能上没区别，介词短做定语，从语义上，有区别。a friend of mine，所属，有关a member of the team组成a woman of Italian descent 来自a photo of my dog有关，显示a crowd of people， 包含，构成a few of the problems 所属群体，构成