名词
中文翻译：信号灯
同义词：
['flag', 'signal', 'light例句：1. The traffic policeman used a semaphore to direct the flow of traffic.（交通警察使用信号灯来指挥交通流量。）']
例句：
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1. The traffic policeman used a semaphore to direct the flow of traffic.
交通警察使用信号灯来指挥交通流量。
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2. The semaphore was a symbol of peace and understanding between nations.
信号灯是国与国之间和平与理解的象征。
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3. The semaphore was designed to prevent accidents on the busy highway.
信号灯被设计用来防止繁忙高速公路上的事故。