"These creatures get their energy from sources we never imagined," McKay exclaims. "the South African extremophile bacteria are powered by the radioactive decay of unstable atoms in the rocks."
“这些生物从一个我们从未想到的来源获取能量，”McKay惊叹，“南非的极端微生物细菌吃的是岩石里不稳定原子衰变时的放射能。”
As we age, we produce less saliva, which washes away bacteria, so teeth and gums are more vulnerable to decay.
随着我们年老，我们分泌更少能冲洗掉细菌的唾液，因此牙齿和牙龈更容易退化。
It looks promising, but we will have to wait for the results to come back from clinical trials and its use will be restricted to treating small areas of dental decay.
这种技术看起来前途无量，不过我们必须耐心等待来自临床试验的结果，而且其治疗范围可能仅限于蛀牙面积比较小的区域。
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