以上这些都是过度敏感的依恋系统的信号。
诚然，这并不总是一个良好健康的信号：20世纪80年代初，美国土地价格飙升，导致许多过度借贷买地的农民破产。
It is true that this is not always a sign of good health: soaring land prices in America in the early 1980s bankrupted many farmers who borrowed too heavily to buy land.
汇率通常会对正在出现的不平衡提出警告，但过度自信和群体行为则削弱了这一信号。
Exchange rates often provide useful warnings about emerging imbalances, but overconfidence and herd behaviour weakened the signal.
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