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.

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。

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A bad bout of cold weather, a long spell of frosts could ruin a farmer's entire crop.

一场恶劣的寒冷天气和长时间的霜冻都可能会毁掉一个农民的全部收成。

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Agricultural commodities prices have surged following a series of crop failures caused by bad weather.

由于受到恶劣天气影响，农作物一再歉收，农产品价格出现大幅上涨。

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Nor are its failures the fault of a coincidentally bad crop of leaders.

ECONOMIST: Books on Africa

That would be the right prescription if Andersen and Enron were the bad apples in a good crop.

ECONOMIST: A profession under fire | The

The recent surge in sugar prices comes after a bad harvest, that of corn after official warnings of a lower-than-expected crop.

ECONOMIST: The charge-sheet against commodity speculators is flimsy