distress signal
英
美
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Noun:
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an internationally recognized signal sent out by a ship or plane indicating that help is needed
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用作名词 (n.)
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The ship sent up distress flares to attract the attention of the coastguard.
这艘船点起了遇险信号以引起海岸警卫队的注意。
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When the captain found the ship was sinking rapidly,he ordered his men to send out a distress signal.
船长发现船在迅速下沉时就命令船员发了遇险信号。
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