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When the captain found the ship was rapidly sinking, 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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Send out a distress signal; the ship is sinking.
发出求救信号吧，船正在下沉。
船在下沉，快发求救信号吧。
The ship launched a distress signal.
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