大约30个抢险工人在事故后不久死于放射线照射。
About 30 emergency workers died of radiationexposure shortly after the accident.
放射线照射：过度的放射线照射将会导致骨质硬化。
Radiation exposure: Excessive radiation exposure will cause bony sclerosis.
该技术是通过放射线照射或者使用化学方法使基因变异。
The technique has been to mutate the genes by irradiation or chemicals.
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