The pen is placed at any point on the rolling circle.

笔可以放在这个滚动的圆形的任何一个点上。

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When the CAM is chiefly transferred movement, the choice of radius of base circle firstly is considered the roller's continuous rolling.

当凸轮机构主要用于传递运动时，基圆半径的选择可使滚子做连续滚动为优先考虑条件。

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A line generated by a point on a circle rolling along a straight line.

一个圆上的某个点在该圆顺着一条直线旋转时形成的线。

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In other words, Winfrey has OWN right where she wants it: rolling in a virtuous circle on its way to profitability.

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Rolling is similarly awkward, but the inclusions of three full move sets mapped to square, circle and triangle actually give more combat options than a Smash Bros. game.

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