In other words, you don't have to be moving actually in a circle to have the acceleration.

也就是说,你不必真的在一个圆上运动以获得相应的加速度

耶鲁公开课 - 基础物理课程节选

It's so gentle, it sounds as if it's fading out from the minute it begins, but it's lovely enough that you can't wait for it to circle back around.

NPR: Vetiver: Shaggy Folk, Dug Out Of Amber

Until you settle down emotionally, don't talk to anyone outside your inner circle, Wendleton advises.

FORBES: Magazine Article

You don't ask Linford Christie to run in a circle do you, so why should swimming be any different.

BBC: The untouchables