The dependence of the poultry sector on imported feedstock has led to the adoption of preventive measures to avoid a collapse in protein supply should exports of feedstock from the United States be paralysed.
养鸡业依赖进口饲料，为了避免在从美国进口饲料的来源断绝时出现蛋白质供应瘫痪，只得采取预防措施。