Yet on page 14, they make "city proper" a smaller subset of the administrative areas of the cities of Tokyo, Mexico City, and Chicago, and imply that "city proper" and "administrative area" can be different.
然而在第14页，他们将“city proper”作为东京、墨西哥城和芝加哥管辖区域中更小的区域，暗示“city proper”（市域）和“administrative area” （管辖区域）可以不同。