But researchers at U.C. San Diego have developed a fluorescent warning system that lights up in the presence of toxins that could lead to food poisoning for a consumer.

不过加州大学圣地亚哥分校的研究员们确实开发出了一套荧光预警系统，在食物中含有可能使食用者中毒的毒素时会发出荧光。