(d) 有大量证据表明，受辐射动物或人的血浆可能会含有所谓的“致断因子”，这些因子能够使未受辐射细胞的染色体发生损伤；
(d) There is a large body of evidence that blood plasma from irradiated animals and humans can contain so-called “clastogenic factors” capable of inducing chromosomal damage in unexposed cells;