名词短语
中文翻译：求救信号
同义词：
['warning', "distress signal例句：1. The plane'sengine cut out", 'and the pilot desperatelytried to signal for help.（飞机的引擎熄火了，飞行员拼命试图发出求救信号。）']
例句：
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1. The plane'sengine cut out, and the pilot desperatelytried to signal for help.
飞机的引擎熄火了，飞行员拼命试图发出求救信号。
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2. The ship was in distress, andthe crew desperately tried to signal for rescue.
船只处于困境中，船员拼命试图发出求救信号。
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3. The firefighters receiveda distress signal from the burning building.
消防员收到了来自燃烧建筑的求救信号。