1·We are a successful species inhabiting a radioactive world and must have evolved protective mechanisms to deal with the effects of natural radiation.
这个世界，放射性物质无所不在。我们是成功生活在其中的一个物种，我们已经进化出对抗自然放射影响的保护机制。
2·If Marine species take up these radioactive particles faster than they break them down, the radiation can concentrate and affect larger animals that eat them.
如果海洋物种吸收放射颗粒的速度快于排出，放射性物质就能够聚集起来并影响食物链上层的大型动物。
3·The data come from a census of 57 bird species that the researchers carried out in the area affected by the radioactive plume from the accident.
这一数据来自对57 种鸟类的调查统计，整个过程是在受放射性羽毛影响的事发地区。