R You go around a circle which has radius r.

你绕圈的半径为。

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Thus, polygon draws a 50-sides polygon that approximates a circle with radius r.

polygon画一个50边的多边形，来近似做一个半径为r的圆。

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The staple product "Bosimei" fibrous vitrolite is a crystallization of several years R&D of our company and an innovative product in the ceramic circle.

主力产品“博斯美”纤瓷板，系本公司经数年精心研究开发的结晶成果，是陶瓷界的一大革新产品。

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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

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It tells you when a particle moves in a circle, it has an acceleration in a negative R direction, namely directed towards the center.

它告诉你当一个物体在圆周上运动时,它有一个在 -R 方向的加速度,也就是说是直接指向圆心的

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That means, it can only be rattling around in a circle of radius R.

也就是说它只能,限制在一个半径为 R 的圆上运动

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