Nothing have ever lived on the moon, but some scientists think that people will live on the moon one day.

虽然没有生命曾经住在月球上，但是一些科学家认为总有一天人们将会在月球居住。

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It would be better to create new cells without involving viruses at all, but some scientists didn't think this would be possible with heart muscle cells.

最好是完全不用病毒就能创造出新细胞，但是一些科学家们认为这对心肌细胞来说是不可能的。

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But many scientists think that the real importance of a museum lies in giving us some hint of future.

但是许多科学家认为，博物馆真正的重要性在于它给我们一些未来的启示。

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Most of us think of them as simply a nuisance - but for some cutting-edge scientists, fruit flies are nothing short of potential lifesavers.

BBC: Edinburgh, Fife & East Scotland