语法：There is still a wide gap between the educational and med

in the urban and rural area 作的是 educational and medical facilities 的地点状语
所以educational and medical facilities in the urban and rural area 整体翻译为：“城乡的教育和医疗设施”
这个句子用的不是“between...and...”,只用了between,
这个句子实际上是这样的：
There is still a wide gap between (the educational and medical facilities in the urban and rural area).
城乡教育和医疗设施之间还有很大的差距.
就好像 There is a big difference between my brothers.
这里的 the educational and medical facilities in the urban and rural area 就充当的 my brother 的位置.