northwestn.西北；西北方adj.西北的；在西北的；来自西北的adv.向西北northwest Changtm长安西北地区Northwest Library国立西北图书馆northwest railway西北铁路northwest highway西北公路northwest regions西北地区Northwest traffic西北交通Northwest Airlines西北航空(财富500强公司之一, 总部所在地美国, 主要经营航空公司)northwest by northn.西北偏北；西北偏北Northwest of China西北地区Northwest Tianshan西天山