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Mayday ['meidei]n. 国际遇险无线电呼救信号[亦作mayday]例句:1. The crew issued a mayday call before diverting the aircraft. 机组人员在转移航道前发出了求救信号。2. Apparently, no mayday call was issued. 显然,没有发出求救呼吁。
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