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.

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他们不赞成种植单一作物和使用化肥。

They frown on monocultures and chemical fertilisers.

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但给单一作物传播花粉威胁这昆虫的健康吗？

But does pollinating monocultures threaten the insects' health?

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