plutonium GMAT专八

1.one tonne of plutonium extracted from spent nuclear fuel

从废核燃料中一吨

2.Plutonium was first discovered in a Berkeley lab (as were the aptly-named berkelium and californium).

铂就是首先在巴克利实验室发现（确切名字该叫巴克利姆或加利福利姆）。