At one time, the president who had retreated and retreated until he was pressed against the wall, could only be secured by a number of gentlemen forming round him and making a kind of barrier of their own bodies.

VOA: special.2009.01.19

Mortgages are debts secured by property as collateral.

抵押贷款是以财产作为抵押的债务

耶鲁公开课 - 金融市场课程节选