A diameter passes through the center of a circle.

直径从圆心穿过。

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A game originating in Scotland in which two four-person teams slide heavy, oblate stones toward the center of a circle at either end of a length of ice.

冰上溜石游戏：一种源于苏格兰的游戏，两队比赛，每队四人，将沉重的椭圆形石头滑向位于冰道两端的圆圈的中心。

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With the Lagrange multiplier method, the minimum distance of the center of a circle and a quadric surface was provided and the tangency condition of curve and surface was given.

利用拉格朗日乘子法求解二次曲线和二次曲面之间的最小距离，给出了曲线与曲面相切的条件。

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They have a center,and arms of matter that seem to circle the center like a pinwheel.

VOA: special.2009.04.29

When a particle moves in a circle, it has an acceleration towards the center of this size, v^2 over R.

当一个质点在圆周上运动时,它有一个指向圆心的加速度,v^2 / R

耶鲁公开课 - 基础物理课程节选

That means the acceleration is pointing towards the center of the circle and it has a magnitude a.

也就是说加速度,始终指向圆心,其模长为 a

耶鲁公开课 - 基础物理课程节选

At the center of the room is a circle of paired mannequins in which one half of each duo wears a '70s ensemble from Westwood-McLaren while the other wears a subsequent couture "take" on that ensemble.

WSJ: Loud, Fast and Nasty | Punk: Chaos to Couture | Metropolitan Museum of Art | By Laura Jacobs

Generally, these manufacturer skins exist with the claimed goal of enhancing the platform's stock functionality, but we actually found a case on the Epic where the opposite is true: the phone's lock screen consists of a circle in the center of the screen that you drag up to unlock... and that's it.

ENGADGET: Epic 4G review

It's as a philosopher once imagined: a circle of which the center is everywhere and the circumference is nowhere.

FORBES: Wireless Everywhere