求高手讲解如下句子,特别是后半部分从句,

题目

求高手讲解如下句子,特别是后半部分从句,
The first group is of the advanced economies whose per capita income has converged with one another and toward that of the US.

答案

第一组是发达经济体,其中人均收入逐一收敛,并且与美元经济体接近.此句子主句：The first group is of the advanced economies,whose引导的从句部分用来修饰advanced economies,toward that中的that是代词,代指per ca...