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1. Oxford Dictionary

   circumference

   • IPA[səˈkʌmf(ə)rəns]

   英式

   • n.
     the enclosing boundary of a curved geometric figure, especially a circle.；the distance around something

   • noun: circumference, plural noun: circumferences

2. • 釋義

   n.

   名詞

   • 1. the enclosing boundary of a curved geometric figure, especially a circle. 同義詞 perimeter, border, boundary, edge, rim, ... 更多verge, margin, outline, fringe, bounds, limits, extremity, confines, literarymarge, bourn, skirt
   • ▪ the distance around something babies who have small head circumferences a rope two inches in circumference 同義詞 girth, width
3. • 更多解釋

   circumference

   • IPA[sərˈkəmf(ə)rəns]

   美式

   • n.
     the enclosing boundary of a curved geometric figure, especially a circle.

   Oxford American Dictionary