The international radio code-signal of extreme distress, used esp. by ships at sea.
| 单词 | θ191864 |
| 释义 | society > communication > indication > signalling > [noun] > signal > distress signal > by radio (2) S.O.S.1910 The international radio code-signal of extreme distress, used esp. by ships at sea. Mayday1975 A distress signal consisting of the word ‘Mayday!’ Also more generally: any distress call or call for help. |
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