外毒素

例句：

1. 1. The bacteria that causes food poisoning is a type of exotoxin.
   引起食物中毒的细菌是一种外毒素。
2. 2. Exotoxin production is a common cause of foodborne illnesses.
   外毒素生产是常见的食物传播疾病原因。
3. 3. Researchers are studying the effects of exotoxins on human health.
   研究人员正在研究外毒素对人类健康的影响。