当遇到不平坦的地面时要格外小心—残渣和裂缝可能导致突然的停止并使动作不受控制。

Be extra cautious when heeling on uneven surface - debris and crevices can cause sudden stops and uncontrolled movements.

youdao

试试放慢你的高尔夫挥杆动作，使动作完成花去90秒的时间，看看你察觉出多少个错误。

Try to slow down your golf swing so it takes 90 seconds to finish. See how many errors you detect.

youdao

她做了一个扇扇子的动作，假装使自己凉快一些。

She made a fanning motion, pretending to cool herself off.

《柯林斯英汉双解大词典》

But another possibility is once you do something it's kind of hard to stop.

但也有可能是因为,婴儿很难使自己的惯性动作停下来

耶鲁公开课 - 心理学导论课程节选

So, there's a continuum of electrical connection in the heart that allows an action potential to sweep across the surface of the heart and for the heart to beat in a coordinated fashion.

所以 心脏细胞有电偶联的连结组织,以使动作电位平稳在细胞表面传递,保证心脏的协调性跳动

耶鲁公开课 - 生物医学工程探索课程节选