详细解释:n. 救难信号
英语解释：
名词 mayday:
an internationally recognized distress signal via radiotelephone (from the French m'aider)详细解释：
may.day
n.（名词）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
来源：From French m`aidez [help me!] 源自 法语 m`aidez [救命]
<注释>.Mayday, mayday!. comes the international distress signal over the radio,and nobody stops to ask why the first of May is being mentioned at a time of crisis.Mayday, in fact, has nothing to do with the first of May. Instead, it is a spelling that represents the pronunciation of Frenchm`aidez, .help me,. or the latter part of the phrase venez m`aider, .come help me,. either of which are quite appropriate at such a critical juncture..救命，救命!.无线电 * 中传来国际遇险呼救信号，总有人询问为何在危急时刻使用五月的第一天作为信号。实际上，Mayday 和五月份的第一天没有任何关系。 相反，它只是和法语中m`aidez .帮助我.或短语 venez m`aider .来帮助我.的后半部分的读音相同的一种拼写， 均适用于指紧要关头