短語詞組短語National trunk highway network 國道主干線公路網(wǎng)national l highway 國道National Defense Highway System 州際公路系統(tǒng)National Trunk Highway System 中國高速公路national defense highway 國防公路national trunk highway 國家干線公路national main highway 國道national defence highway 國防公路national debt highway 國債公路 返回 national highway