1.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。
2.The energy absorbed by the chlorophyll molecules of the unstable autumn leaf is not immediately channelled into useful products and processes, as it would be in an intact summer leaf.