英语短语词组词汇distress signal的音标、释义、翻译、用法及例句-英语短语词组词典-老街网

短语	distress signal
释义	distress signal (遇难船只或飞机等发出的)求救信号，遇难(呼救)信号(如SOS)[参较distress call] (病人等的)危急求救信号(或呼号) (尤指不用语言传达的)求援信号
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