英语词汇distress signal怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	distress signal
释义	distress signal distress signal n: (help-needed signal) SC 呼救信号 hū jiù xìn hào TC 呼救信號 'Mayday' is an emergency code word used internationally as a distress signal.
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