"Our defense against oxidative stress damage may determine at what rate we age, how it will manifest and how to interfere in those processes," Nel said.

Nel说，我们的防御抗氧化重损伤也许将确定什么使我们衰老，它是怎么表达和干预在那些过程。

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This is a radical new way of thinking in how to increase the immune function of elderly people to possibly protect against viral infections and cancer, " Nel said."

“这是一个激进的新的思维方式，在如何提高免疫功能的老人，可能防止病毒感染和癌症，”内尔说。

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"As we age, the ability of the immune system to fight disease and infections and protect against cancer wears down as a result of the impact of oxygen radicals on the immune system," Nel said.

Nel说，当我们变老时，由于氧自由基对免疫系统的影响，导致系统免疫防御和免疫监视能力下降。

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Inside court Mr Nel said that they would be arguing that it was "pre-meditated murder".

BBC: Oscar Pistorius: South Africa stunned by murder charges

Mr. Nel said Mr. Pistorius then fired four shots from a 9mm handgun through the closed bathroom door, before forcing his way into the bathroom.

WSJ: Pistorius Thought He Shot at Burglar in Bathroom, His Lawyer Says

Prosecutor Gerrie Nel said Steenkamp had come over around 5 p.m. to 6 p.m. on February 13 to spend the night, but the couple got in a heated argument.

CNN: STORY HIGHLIGHTS