northern slope 北坡（美国阿拉斯加州北冰洋之间）northern shoveler [生物学]琵嘴鸭northern scenery 北国风光northern right-whale dolphin northern qinghai-tibet plateau [农业科学]藏北高原northern province northern premier league northern pike northern oriole northern nanny [地球科学]北雹风northern middle latitude [环境科学技术]北半球中纬度northern link northern line northern limit line northern lights northern light 北极光northern leopard frog northern league northern latitude n. [地理] 北纬northern karelia province