求翻译：Some years ago on the southwestern coast of England, a lifeboat station that did not have the new type of lifeboat received a radio call from a ship that was sinking. The call came in the middle of the worst storm. The sea was very rough, but the lifeboat went out to try to save the men on the sinking ship. Two hours later, their radio stopped, and nothing more was heard from them. One day later a helicopter found the lifeboat. It was lying upside down in the sea. Probably a large wave hit it and turned it over. There were no more survivors(幸存者).是什么意思？

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