translation.en: After World War II, we started using pesticides on a large scale, and this became necessary because of the monocultures that put out a feast for crop pests.
translation.zh: 二战后，我们开始大规模使用杀虫剂 这变成必要的， 因为单一耕作模式 为害虫提供了一顿盛宴。