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circumference

美[sər'kʌmfərəns] 英[sə'kʌmfərəns]

n. 圆周；周围；周长

形容词：circumferential

近义词：border，circuit，compass，perimeter，boundary，bounds，edge，fringe，

Noun

the size of something as given by the distance around it
the boundary line encompassing an area or object;
"he had walked the full circumference of his land" "a danger to all races over the whole circumference of the globe"
the length of the closed curve of a circle

用作名词(n.)

That point falls on the circumference of the circle.那一个点落在这圆的圆周线上。
He went jogging around the circumference of the reservoir every morning.他每天早晨绕着水库周围慢跑。
This tree has a circumference of 6 feet.这棵树周长六英尺。
The circumference of the earth is almost 25,000 miles.地球的圆周长约为两万五千英里。

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