You can take circles of different size and place them against your trajectory and see which one fits.

你可以做不同大小的圆周运动,然后把它们放到你的轨迹上,看哪一个匹配

耶鲁公开课 - 基础物理课程节选

There's a lot of, you know, surfing, water sports, skating, stuff like that that I like to do.

可以经常，你知道，可以冲浪、水上运动、滑冰，我喜欢做的那些事。

坐地铁上班 - SpeakingMax英语口语达人