Essentially this measures if the signal is systematically shifted off the x-axis.

本质上，这可以测量信号是否系统地偏离 x 轴。

It recorded radio signals associated with auroras on Jupiter and then it shifted these signals into a range where we can listen to them and speed them up.

它记录了与木星上的极光相关的无线电信号，然后将这些信号转移到我们可以听到并加速它们的范围内。