英语语法分析

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.

皮埃尔·居里和她一起致力于解决这个问题，结果发现了新元素钋和镭。

In 1898 they discovered polonium and radium.

1898年，他们发现了钋和镭。

So, you've got polonium or thorium sitting inside this leaded box with one opening.

把钋或者钍放在,开一个小口的含铅的盒子里面。