Eventually the new lithium-iodine battery offered a radiation-free eight-to-ten year lifespan, and no exhaust gases to worry about.

最终锂电电池投入使用，电池不仅没有辐射还有八到十年的使用寿命，而且也不会释放出废气。

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The researchers found evidence of fusion between blood cells and Purkinje neurons in this radiation-free system 20 to 26 weeks after surgery.

研究者在手术20到26周时，在这一无放射性的系统中发现了由血细胞和Purlinje神经元组成的融合细胞。

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To the scientists' surprise, the mice that were dosed with cell phone radiation did not suffer from memory impairments as they aged-unlike their radiation-free counterparts.

使科学家们吃惊的是，受到手机辐射测试的老鼠在衰老过程中没有出现记忆障碍——不像那些未受辐射的参照鼠。

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Shippers have urged the government to issue certificates that would assure foreign ports that goods are radiation-free.

ECONOMIST: A spreading cloud of economic and human costs

He went through nine weeks of radiation treatments and has been cancer-free ever since.

CNN: His other car is on Mars

Further loss of Arctic ice will see radiation absorbed by darker seawater and snow-free land, potentially warming the Earth's climate at an even faster rate than current observational data indicates.

BBC: Canadian Arctic sheds ice chunk