举个极端的例子，以单一作物为主的农田是如此不稳定，一年的坏天气或单一害虫的入侵可以摧毁整个作物。
To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop.
市场为什么会如此不稳定？
这可能会有助于解释儿童最早的记忆为何如此不稳定：他们的神经痕迹又弱又浅，而随着我们越来越大，不断回访的那些记忆会留下更深的痕迹。
That may help explain why children's earliest memories are so unstable: Their neural traces are weak and shallow, whereas the few memories we revisit as we get older lay down stronger traces.
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