相关的科学家联盟估计，在美国生产的抗生素大约有70％用于饲养动物，以不利于健康来牟取其它利益。

The union of concerned scientists estimates that roughly 70% of antibiotics produced in the United States are fed to animals for nontherapeutic purposes.

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大部分为超市提供肉类的饲养场和其它工业农业系统，一般都依赖于大量的抗生素，以加快动物的生长速度及预防动物因肮脏的环境而致病。

Feedlot and other industrial farming systems that provide the majority of supermarket meat rely on heavy antibiotic use to speed the animals' growth and prevent disease in their filthy conditions.

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导游说到，每年都有一块如同加州大小的雨林面积被摧毁，以为了降低饲养牛的成本来获得便宜的牛肉，或者放牧其它动物来当作食物源或者收入。

The tour guide said that a rainforest regions the size of California is being destroyed each year for the purposes of raising cattle for cheap beef or grazing other animals for food source or income.

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