| 单词 | circumference of a circle |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔center〕A point equidistant from all points on the circumference of a circle or on the surface of a sphere.圆心，球心：与一圆周上或一球面上所有点等距的一点美国传统〔cycloid〕Mathematics The curve traced by a point on the circumference of a circle that rolls on a straight line.【数学】 圆滚线，摆线：圆周上任一点在一条直线上滚动时所形成的曲线美国传统〔epicycloid〕The curve described by a point on the circumference of a circle as the circle rolls on the outside of the circumference of a second, fixed circle.外摆线：一个动圆沿另一个定圆外侧滚动时，动圆圆周上一点的轨迹曲线美国传统An arc is a part of the circumference of a circle or other curved lines. 弧是圆周或曲线的一部分。译典通 |
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