| 释义 |
SOSHes7EJ5es, $.-oJ5-n [C]a request for help, esp. because of danger紧急呼救信号In Morse code, an SOS consists of three short sounds or flashes followed by three long ones and then three more short ones.在莫尔斯电码中，紧急呼救信号是由这样一组信号构成的: 三声短的信号或闪烁，接着是三声长的，然后再是三声更短的。Within an hour of the ship transmitting an SOS (message/call), six boats had arrived and started a rescue operation.在这艘船发出紧急呼救信号后的一小时内，有六条船到达这里，并开始了救援工作。The hospital sent out an SOS for extra blood supplies.这家医院发出了紧急呼救信号，要求额外的血液供应。
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