Pierre Curie joined her in the work that she had undertaken to resolve this problem, and that led to the discovery of the new elements, polonium and radium.
2
1898年，他们发现了钋和镭。
In 1898 they discovered polonium and radium.
3
把钋或者钍放在,开一个小口的含铅的盒子里面。
So, you've got polonium or thorium sitting inside this leaded box with one opening.
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