名词
中文翻译：信号员
同义词：
['signaller', 'signaler', 'signalist']
例句：
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1.He was a skilled signalman who could communicate with the ships at sea.
他是一位技艺高超的信号员，能够在海上与船只进行通信。
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2. The policeman was the signalman for the fire department.
那位警察是消防部门的信使。
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3. The signalman used a whistle to alert the train to stop.
信号员使用哨子来警告火车停下。