Based on previous research, the researchers hypothesized that radiation from phones would accelerate progression of the disease be-cause other types of radiation cause free radical damage.

根据以往的研究，研究人员推测，手机辐射会加速疾病的进展，因为其他类型的辐射都会造成自由基损伤。

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This is the reason the health establishment is so insistent on people eating more fresh produce: It provides around-the-clock defenses against free-radical damage to your arteries.

这就是健康组织坚持建议人们多吃新鲜果蔬的原因：新鲜果蔬能够给你提供不间断的保护，来对抗自由基给你的动脉血管带来的损害。

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We may disagree on certain issues, yet we should properly resolve our differences in a spirit of mutual-respect to ensure our bilateral relations free of any damage.

两国对一些问题有不同看法，应本着相互尊重的态度妥善解决，避免对双边关系造成损害。

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While their handsets were scratch-free when they come out of the box, the handsets soon picked up significant damage on the back and sides from light usage.

FORBES: Check Your New iPhone 5 For Scratches

Even though he is available on a free transfer his time on Tyneside has been plagued by injury problems, including a broken metatarsal bone, knee ligament damage sustained at the 2006 World Cup, a double hernia operation and a thigh problem.

BBC: Hull 'serious' about bid for Owen