从技术上讲，我可以挖一些汞，铅，砷和其他有毒物质从土壤，东西成豆腐配方，并将其出售的“100 %天然”的产品。
Technically speaking, I could dig up some mercury, lead, arsenic and other toxic substances from the soil, stuff them into a tofu recipe, and sell it as a "100% natural" product.
砷和铅也是天然形成的金属元素，在工业上从制造杀虫剂到应用于电子工业，它们有着多种用途。
Arsenic and lead are also naturally occurring metallic elements that have varieties of USES in industry from insecticides to electronics.
有机砷，由名字即可得知，它天然存在于环境当中，而且许多食物都含有有机砷。
Organic arsenic, hence the name, is naturally occurring in the environment and can be found in many foods.
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