Ke̍k-khian

Ke̍k-khian (極圈; Eng-bûn: polar circle) sī lâm-pak-hūi ê 66.5° hūi-soàⁿ.

Che sī chi̍t phiⁿ kap tē-lí-ha̍k siong-koan ê phí-á-kiáⁿ. Chhiáⁿ tàu khok-chhiong.