quarter-circle
美
英 
例句
And you can see there, it needs a quarter-circle of paper to make a flap.
就像你们所看到的,只需要纸上四分之一个圆就可以作出一个片状物。
A quarter circle with a radius of1 m(1 yd) from each corner flag post is drawn inside the field of play.
在比赛场地内,以距每个角旗杆1米(码)半径画一个四分之一圆。
One diver thought he was turning his body through a quarter circle;
一个潜水员想要转动他的身体四分之一周;