环极涡旋環極渦旋

huán jí wō xuán

Meaning

circumpolar vortex

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Characters

环huánbracelet, ring; to surround, to loop王不极jíextreme, top; final, furthest, utmost; pole木及涡wōeddy, swirl, whirlpool氵呙旋xuánto revolve, to orbit, to return方疋