Litvinenko was poisoned by tea laced with radioactive polonium-210 at a restaurant in London.

利特维年科在伦敦某餐厅喝下了掺有放射性钋- 210的茶水后中毒身亡。

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Andrei Lugovoi - the man who allegedly slipped radioactive polonium into former KGB agent Alexander Litvinenko's tea - enjoys the personal protection of Putin.

安德烈·卢戈沃伊——被控把放射性钋投入前克格勃特工亚历山大·利特维年科的茶里的人——得到普金的私人保护。

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Madame Curie was the physicist with expertise in chemistry that, in 1898, discovered the radioactive substances of radium and polonium in Paris, France.

居里夫人是一位具有化学专门知识的物理学家。1898年，她在法国巴黎发现了放射性物质的镭和钋。

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Litvinenko, a prominent critic of Russian President Vladimir Putin, is believed to have died from ingesting radioactive polonium-210.

NPR: U.K. Investigators Visit Moscow in Litvinenko Probe

Lugovoi also said he has evidence of London's involvement in the death of Litvinenko, who was dosed with radioactive polonium-210.

NPR: Russian Spy Blames MI6 for Litvinenko's Death

Litvinenko died Nov. 23 in a London hospital after ingesting radioactive polonium-210.

NPR: Kremlin Issues Warning After Expulsions