polar r front极锋
polar-front belt极锋带
polar-front theory极锋说;[气象] 极锋学说
polar-front jet极锋喷流;极锋急流
polar-front极锋
polar-front jet stream极锋喷射气流
polar front theory极锋理论
pacific polar front太平洋北极锋
N(名词) a front dividing cold polar air from warmer temperate or tropical air 极锋 [meteorol]