Los Angeles had a real estate boom and bust in the 1880s; that's hard to believe.

在19世纪80年代，洛杉矶经历了房地产的繁荣和萧条；这难以相信。

What caused the boom and bust?

是什么导致了它的繁荣和萧条？

Securitisation's boom and bust was spectacular.

证券化市场的繁荣与崩溃令人惊叹。

We've seen another whole cycle of boom and bust.

我们已经看到了另一个繁荣和萧条的整体周期。

But social boom and bust is even harder to repair.

但社会的盛衰甚至更难修复。