This exercise is done in one smooth motion.

这套体操是由一个流畅的动作完成的。

《柯林斯英汉双解大词典》

She swung herself over the gate in one smooth movement.

她从门上一跃而过。

《牛津词典》

The Dodger slid out of his coat in one smooth movement, leaving Fagin holding only the empty coat.

神偷以一个非常娴熟的动作从衣服里滑了出来，使费金手里只攥着一件空衣服。

youdao

One sailor described the sea as being as smooth as glass.

VOA: special.2009.05.27

If its future success can be predicted from its present appeal, it should be one smooth ride.

FORBES: A Standing Ovation

The center armrest between the front seats, which swings open to reveal a storage bin, is one smooth piece of leather devoid of unsightly shut lines.

FORBES: With Trendsetting Technology, 2014 Mercedes-Benz S-Class Gets All Up In Bentley's Business

The Jetpatcher does all this in one smooth operation, then moves on to the next pothole as traffic resumes its path over the newly repaired road.

BBC: Jetpatchers at work