They had been interested in thorium — a radioactive element that can fuel nuclear reactors but not be processed into weapons.
他们当时对一种放射性元素钍很感兴趣，这种元素能驱动核反应堆，却不能制造生产成武器。
2
Followed by the slow decomposition of uranium to another elementthorium.
铀元素随后缓慢分解为另一种元素钍。
3
The invention discloses a multi-element high-temperature resistant anti-shock magnetron cathode which comprises tungsten, thorium, rhenium and potassium.