死守，读音是sǐ shǒu，汉语词语，意思是拚死防守。
“他们不可能死守不放的，”默多克的传记作者迈克尔·伍尔夫说。
"They can't possibly stick with it," says Murdoch's biographer, Michael Wolff.
按揭公司将不得不死守每一笔贷款，而不能将它们抛售以摆脱风险。
Mortgage companies will be obliged to hang onto part of every loan, rather than selling them on to shed risk.
除了客户并不那么热衷，软件公司死守老的业务模型也是重要原因。
This was partly because their customers were not that keen. But more importantly, notes Mr Thill, the software houses are still wedded to their old business model.
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