We have most friends at the age of 26 after having spent the first quarter of our lives building up our friendship circle, a new study has revealed.

一项最新研究显示，人们在26岁的时候朋友最多，因为我们已经花了人生四分之一的时间来建立我们的朋友圈。

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Corner Area: the edge line with the goal line cross, have a dot, radius is 1m, drawing a quarter of circle arc.

角球区：以边线和球门线交叉点为圆点，以1米为半径，向场内各画一段四分之一的圆弧，这个弧内地区叫角球区。

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The smooth transition between circle and square occurs at the same time as the ring rail made of platinum describes a three-quarter twist.

圆形和方形之间的平稳过渡为白金制成的，描述了三季度扭在同一时间。

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He qualifies exhumations as a humanitarian act that allows families to close what he calls the circle of pain and mourning in which they have been caught for a quarter of a century, and says it was unthinkable as recently as a few years ago that investigations into war crimes would have been allowed in this country.

VOA: standard.2009.12.18

So that a half circle, instead of calling it 180 degrees, And a quarter circle, instead of 90, It's good to know certain famous angles.

半圆,不说它是180°,四分之一圆,不叫90°,知道一些常用的角度很有必要

耶鲁公开课 - 基础物理课程节选

During this part, when you're doing a quarter of a circle, this is supposed to be a quarter of a circle.

在这部分,当你沿着四分之一圆运动,这就是个一个圆的四分之一

耶鲁公开课 - 基础物理课程节选