If the Burj Khalifa shows that memories of property cycles are short, the Fannie Mae survey suggests that some of the lessons are never taken on board at all.

如果哈利·法塔表明人们关于房地产周期的记忆是短暂的，那么房利美公司的调查则提示人们：某些教训根本就从未被理解和接受。