They had to work on that, they had to devise-- they had to get an appraisal industry that could appraise houses and get some idea of what they're really worth.

他们得做些工作，他们要设计出-,他们不得不借助于评估机构,以便于鉴定房屋情况，并且得知一些,其真实价值的参考意见。

耶鲁公开课 - 金融市场课程节选