英语词汇signal word是什么意思，signal word的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-觉斋网

单词	signal word
释义	DEFINITIVE EXAMPLES 权威例句〔mayday〕An international radiotelephone signal word used by aircraft and ships in distress.呼救信号：遇险的飞机、船只等使用的国际无线电呼救信号美国传统
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