natural roll

基本解释

There is no peaking in the response but simply a smooth roll-off above the natural frequency.
响应期间无高峰期，只是简单的，在固有频率上平滑的跌落。
www.e-gtm.com.cn
Because it's the natural way to keep your stroke technique symmetrical. Bilateral is particularly good for developing good body roll to both sides since you need to rotate well to breathe.
（因为它（双侧换气）是你保持对称的划水技术的自然方式，“双侧换气”对提高身体向两侧滚动方面非常有好处，这是由于为了换气你需要良好的身体滚动。）

The public relations campaign for natural gas is already on a roll.
FORBES
So powerful is this curse, apparently, it can upturn natural law so as to let a baseball roll through a first baseman's legs during a crucial World Series game.
FORBES: Four Mice Of The Apocalypse