1. The outbreak of food poisoning was traced back to the presence of tyrotoxicon in the cheese.
食物中毒的爆发被追溯到奶酪中存在的 tyrotoxicon。

2. The production of dairy products undergoes strict quality control to ensure the absence of tyrotoxicon.
乳制品的生产经过严格的质量控制，以确保没有 tyrotoxicon 的存在。