We can break the balance of nature by increasing the category and quantity of pests' natural enemy so as to limit their growth and thus prevent the harm.
而增加对害虫天敌的种类或数量，来打破自然界的相对平衡，使之不利于害虫种群的增长，从而减少和防止它们的为害。
We can break the balance of nature by increasing the category and quantity of pests' natural enemy so as to limit their growth and thus prevent the harm.
而增加对害虫天敌的种类或数量，来打破自然界的相对平衡，使之不利于害虫种群的增长，从而减少和防止它们的为害。
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