名词
中文翻译：水信号
同义词：
['hydrosignal', 'water message']
例句：
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1.The ship's radio was sending out a water signal to the shore.
船的无线电正在向岸边发送水信号。
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2. The submarine was using a water signal to communicate with its crew.
潜艇正在使用水信号与它的船员进行通信。
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3. The military used water signals to communicate over long distances.
军队使用水信号在长距离上进行通信。