They were made to listen to white noise, such as static of the sort you might pick up between radio stations.

他们被迫听白噪音，那种类似于调电台时听到的静电噪音。

《柯林斯英汉双解大词典》

They would burn out, arc out, or pick up so much static and other interference as to render them useless.

因为它们可能被烧毁、电弧受到影响或接收到静电干扰。

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