What passes for "exposure" in the case of nonviral cancers is a combination of genes and environment and a range of other X factors that can vary from person to person.
就与病毒无关癌症而言，这种“暴露”包括了因人而异的基因、环境以及许多其他未知因素。
2
On average, the rash occurs 14 days after exposure to the virus (within a rangeof seven to 18 days).
皮疹在与病毒接触后的7到18天之间出现，平均天数是14天。
3
Lead can cause a wide rangeof disorders, including anaemia and hepatic and neurological disorders and food can be a major route of exposure.