return-to-zero-time的意思|示意

He argued that the Fed was basically powerless to return the economy to full employment once rates hit zero, which confused me at the time.

一旦名义利率降为零，美联储就毫无办法将经济带回到充分就业。当时我对这个说法感到困惑。

The system can automatically determine the sample breakdown and collect the breakdown voltage data and leakage current, and can quickly reduce the automatic return to zero at the same time.

系统能够自动判别试样击穿并采集击穿电压数据及泄露电流，同时能够在击穿的瞬间电压迅速降低自动归零。