He raced to pick up the life jackets while his stepmother sent out a Mayday call.
他的继母发出无线电求救信号，他飞跑着去拿救生衣。
At 1:50 a.m., just 30 minutes after its first Mayday call, the Estonia vanished, sinking upside down into the sea.
在凌晨1：50，就在它第一次发生求救信号30分钟后，Estonia号消失了，翻了个身沉入大海。
No other passenger jet in modern history had disappeared so completely — without a Mayday call or a witness or even a trace on radar.
因为，现代历史上还没有哪架客机像法航447航班一样消失如此彻底----没有求救信号，没有目击者，甚至没有在雷达上留下任何痕迹。
A clearly worried Walters used his CB radio to transmit a mayday call, which was picked up by operators on the ground who then maintained contact with him throughout the flight.
Walters真的担心起来，他用无线电发了呼救信号，地面接线员接到信号并自此和他一直保持联系。
But even if another vessel was involved, it's hard to explain how an alert captain or watch stander would not have spotted an approaching container ship in time to make an adequate mayday call.
即便真的有其他船只牵涉进来，也很难解释为什么一位警觉的船长或值班人员都没有及时发现这样一艘正在靠近的集装箱船并发出求救信号。
Even if people are in deep coma, people still breathe. This design helps people to send "help me" or "mayday" call continiously by breathing of hunan body.
即使人在昏迷状况下，呼吸活动也仍然在进行，这款呼救器的设计就是利用人的呼吸可以不间断地发出求救信号。
Even if people are in deep coma, people still breathe. This design helps people to send "help me" or "mayday" call continiously by breathing of hunan body.
即使人在昏迷状况下，呼吸活动也仍然在进行，这款呼救器的设计就是利用人的呼吸可以不间断地发出求救信号。
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