Exposure to type-2 alkenes in the environment has already been linked with cancer, heart disease, and other problems.
科学家已经将癌症、心脏病及其他疾病与暴露在含有2型烯烃的环境里关联起来。
2
The source of exposure for the initial case is still under investigation, with exposure to infected poultry or an environment contaminated by their faeces considered the most plausible source.
该最初病例的接触源仍在调查之中，接触受感染的家禽或受其粪便污染的环境被认为似乎是最合理的接触源。
3
It is a tightly controlled environment, in which an iron grip is kept on the media exposure of the Obama children both for reasons of family and of state.