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1. | an epicycloid in which the rolling circle equals the fixed circle. |
| 旋转的圆和固定的圆大小一样时产生的外摆线。 |
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2. | a line generated by a point on a circle rolling around another circle. |
| 一个圆上的某点在该圆旋转另一个圆时产生的线。 |
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3. | a cycloid generated by a point inside the rolling circle. |
| 旋转的圆内部一点产生的摆线。 |
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4. | 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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5. | rolling circle model |
| 滚环模型 |
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6. | compress dough into a circle with a rolling pin; |
| 用擀面杖把生面擀成圆片; |
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7. | opposing rolling circle model |
| 对向滚环模型 |
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8. | a cycloid generated by a point outside the rolling circle. |
| 旋转的圆的外部一个点所产生的摆线。 |
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9. | Fly a clockwise circle while rolling the helicopter to the right. |
| 以直升机向右侧滚的方式,执行顺时针方向的水平圆。 |
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10. | Repeat flying a clockwise circle, but this time rolling the helicopter to the left. |
| 以直升机向左侧滚的方式,执行顺时针方向的水平圆。 |
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