Surface and volume radioactivity standards for clearance 间隙表面和容积放射能标准
We have to learn to control radioactivity 我们必须学会控制放射能。
Measurement of radioactivity 放射能测定
The above section very accurately describes what an atomic explosion would look like and the effects of the radioactivity on the population 上述章节很精确地描述多麽像原子爆炸啊以及对人产生的放射能作用。
French physicist pierre curie , a pioneer in the study of crystallography , magnetism , piezoelectricity and radioactivity , died at 47 on april 19 , 1906 法国物理学家皮埃尔?居里于1906年4月19日逝世,享年47岁。他是结晶学,磁学,压电现象和放射能领域的先锋。