Zero lag seems to occur when the delays in the mutual coupling and self feedback between two systems act to keep them in step.

当两个系统中的相互耦合和自反馈中的延迟是用来使它们保持同步时，似乎零延迟就可以实现了。

youdao

Speed feedback, zero speed, running, healthy.

速度反馈，零速，跑步，健康。

youdao

Our mathematical analysis shows that the optimal strategy is actually a feedback control that takes zero -effect miss as error signal.

分析表明：最优策略实质上是以零控脱靶作为误差信号的反馈控制。

youdao

And one academic review of more than 600 employee-feedback studies found that two-thirds of appraisals had zero or even negative effects on employee performance after the feedback was given.

WSJ: Performance Reviews Lose Steam