名词
中文翻译：地面信号
同义词：
['ground wave', 'ground wave signal例句：1. The ground signal was strong enough to detect the distant object.（地面信号足够强，能够探测到远处的物体。）']
例句：
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1. The ground signal was strong enough to detect the distant object.
地面信号足够强，能够探测到远处的物体。
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2.The ground signal was picked up by the antenna.
天线接收到了地面信号。
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3. Ground signals can be used to determine the location of a transmitter.
地面信号可以用来确定发射器的地理位置。