名词
中文翻译：前哨信号灯
同义词：
['前哨灯，前哨灯信号例句：1. The front semaphore is a crucial part of the military communication system.（前哨信号灯是军事通信系统的关键部分。）']
例句：
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1. The front semaphore is a crucial part of the military communication system.
前哨信号灯是军事通信系统的关键部分。
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2. The front semaphore was used to alert the troops to potential danger.
前哨信号灯用于警告部队潜在的危险。
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3. The front semaphore was designed to improve communication between units.
前哨信号灯的设计是为了提高单位之间的通信效率。