The scientists who discovered radium did not know that it would kill them.
那些发现了镭元素的科学家，并不知道这种元素会让他们丧命。
The radiation radius of the radioactive radium radiator in the stadium is variable.
放射性的镭暖气装置的辐射半径在体育场是易变的。
It is produced from radium in the decay chain of uranium, an element found in varying amounts in all rocks and soil.
它产生于铀衰变链中的镭，而铀是所有岩石和土壤中都能找到的一种元素，含量各不相同。
Madame Curie was the physicist with expertise in chemistry that, in 1898, discovered the radioactive substances of radium and polonium in Paris, France.
