| 词汇 | circumference | 
| 释义 | circumference  noun [ C or U ] uk/səˈkʌm.fər.əns/ us/sɚˈkʌm.fɚ.əns/  圆周;周长;周线 the line surrounding a circular space, or the length of this line  the circumference of a circle 一个圆圈的周长   (圆形或弧形物体的)外周或外周长度 the outside edge of an area or object that is round or curved, or the length of this edge  the circumference of an orange 一只橙子的外周  | 
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