a point on the circumference造句

例句与造句

1. The curve traced by a point on the circumference of a circle that rolls on a straight line
   圆滚线，摆线圆周上任一点在一条直线上滚动时所形成的曲线
2. It's difficult to find a point on the circumference in a sentence. 用a point on the circumference造句挺难的