整个旋转过程中，表针应平稳变化，而不应有任何跳动现象。

The entire rotating process, hands should be steady change, and should not have any beat phenomenon.

youdao

若在调节电阻值的过程中，表针有跳动现象，则说明该电位器存在接触不良的故障。

If in the regulation of the resistance value of the process, hand beating phenomenon, the existence of the fault of bad contact potentiometer.

youdao

实验证明，当小动脉发生持续性收缩时，骨胳肌发生痉挛跳动，肢体麻木等现象。

Experiments have proved that when the arteriole produce durative contraction, skeletal muscle cramps occur, numbness, etc.

youdao