circumference
n. 圆周；周围；周长
形容词：circumferential
近义词：border，circuit，compass，perimeter，boundary，bounds，edge，fringe，
英英释义
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
例句
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。