You may be able to use a device that transmits radio signals.

你可以使用一种能发射无线电信号的装置。

youdao

In some states, you may be able to use a device that sends radio signals, allowing stolen cars to be tracked by police.

有些情况下，你可以使用一个装置发射无线电信号，让警察可以追踪被盗的车辆。

youdao

Radio waves became known to scientists as Hertzian Waves. But the experiment was still of no use until Guglielmo Marconi improved on the device that created Hertzian Waves.

虽然赫兹电波作为无线电波已成为科学家们的共识，但在古列尔摩。马可尼对产生赫兹电波的装置加以改进之前，这项实验依然没有用途。

youdao

Radio waves became known to scientists as Hertzian Waves. But the experiment was still of no use until Guglielmo Marconi improved on the device that created Hertzian Waves.

虽然赫兹电波作为无线电波已成为科学家们的共识，但在古列尔摩。马可尼对产生赫兹电波的装置加以改进之前，这项实验依然没有用途。

youdao