名词
中文翻译：无线电呼叫信号同义词
同义词：
['radio signal', 'radio message', 'radio transmission']
例句：
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1. The police used a radio call signal to warn the public about the imminent danger.
警方使用无线电呼叫信号警告公众即将到来的危险。
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2. The pilot used a radio call signal to communicate with the ground control tower.
飞行员使用无线电呼叫信号与地面控制塔进行通信。
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3. The military used radio call signals to coordinate their operations across the entire battlefield.
军队使用无线电呼叫信号来协调整个战场的作战行动。