They built machine-learning software to analyse the data; this netted nearly three million signals of interest but discarded most as Earth-based interference.

他们开发了机器学习软件来分析数据；它收集了近300万个有趣的信号，但大部分被判定为是来自地球的干扰而丢弃。

And that's why, if you tire out one batch, you have a net signal in the other direction.

这就是为什么，如果你用完一批，你就会在另一个方向上得到一个净信号。