辐照会残留一些不明的放射性物质在食物里面。
Irradiation leaves no traces of radioactive material in food.
还有一种可能性就是在辐照过程会发生异常的化学反应，这些化学反应可能会形成对人类有害的化学物质。
There is also the possibility that the unusual chemical reactions that occur during irradiation may lead to the formation of chemicals that may be harmful to humans.
在辐照的食品中已经鉴定出有一些潜在的致癌及致变物质。
Some potential carcinogens and mutagens have also been identified in irradiated foods.
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