This is scientific heresy: the received wisdom is that any level of radiation causes harm and high doses result in cancer and death.
这是科学异教：公认的常识是，任何程度的辐射都会带来伤害，高剂量则会引起癌症及死亡。
2
But an air filtration system installed Thursday has brought radiation down to a high, but more acceptable, level.
但是星期四安装的一座空气过滤系统把辐射程度降低到一个高点，但是是比较能接受的水平。
3
The crew of a helicopter was told Wednesday to stop dumping water and chemicals on a boiling pool of high-level radioactive waste because of elevated levels of radiation.