许多次级贷款借款人在经济衰退期间难以偿还债务。

Many borrowers with ___subprime loans struggled to repay their debts during the economic downturn.

金融危机期间，许多投资者因购买次级抵押贷款相关证券而遭受重大损失。

During the financial crisis, many investors suffered huge losses from ___subprime-related securities.