名词
中文翻译：信号
同义词：
['signal', 'beacon', 'indicator']
例句：
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1.The salvo signal was heard from the battleship.
从战列舰上听到了信号弹。
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2.The beacon on the ship helped to guide the lost sailors home.
船上的灯塔帮助迷失的水手回家。
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3.The indicator showed that the temperature had dropped significantly.
指示器显示温度已经显著下降。