circumpolar vortex绕极涡旋;极地环流
circumpolar species环极圈种
circumpolar constellations[天] 拱极星座
circumpolar distribution环极分布
circumpolar curreut环极流
circumpolar deewater环极深层水
circumpolar star[天] 拱极星;环极性星;拱极星;拱星
circumpolar whirl绕极旋风;[气象] 环极旋风;极地涡旋
circumpolar cyclone绕极气旋;环极气旋
ADJ（形容词） (of a star or constellation) visible above the horizon at all times at a specified locality on the earth's surface 拱极的