我的理解是the output of non-OPEC nations, ( including Norway, Mexico, and Russia, ) 后面的()是修饰the output的 因为non-opec nation 也是修饰它的,如果要修饰nation 就是要用which的 例如,friends of Mary,including Pter,aa ,bb ,dd would come friends of Mary ,whose borther is pter,aa ,would come 例子不是很好 人不能用which 但是可以想象一下吧 |