This is a region of very flat ground extending from the Canadian border to the Gulf of Mexico,and ea

题目

This is a region of very flat ground extending from the Canadian border to the Gulf of Mexico,and eastward as far as the Appalachian Mountains.
这里的as far as
和什么什么一样远?就什么什么而言?

答案

这是一个地区非常平坦的土地延伸至加拿大边境的墨西哥湾,东到阿巴拉契亚山脉.
as far as指远到...直到...