大规模种植单一作物的农业模式增加了病虫害的风险。

Large-scale ___monocultures increase the risk of pests and diseases.

过度依赖单一作物会使农业生态系统变成脆弱的单一栽培体系。

Over-reliance on a single crop can turn agricultural ecosystems into vulnerable ___monocultures.