Our genes also help determine whether we look on the bright side, helping explain why some people have a spring in their step.

我们的基因也帮助决定我们是否看到光明的一面，帮助解释为什么有些人步履轻快。

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The themes and sub-themes match, each one helping explain and answer the other.

主题和副主题都相互匹配，每卷书都有助于说明并答复另一卷书。

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As a result, the reconstructed bug was able to reach exceptionally high concentrations in the lung tissue of mice tested, helping explain its virulence in humans.

结果，这个重建的病毒可以在实验小鼠的肺组织中达到格外高的浓度，这有助于解释它在人类中的毒性为何如此之强。

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How valuable are such partially explained records in helping explain the past?

WSJ: Climate Emails: Science and Candor

Professor Donald MacRae, who co-ordinates the PMI for Bank of Scotland, suggests Scottish manufacturing may be benefiting from modernising in the pre-recession era to a more lean profile, helping explain why things look better for now.

BBC: Banking on the future

And helping to explain is a cast that reads like a Who's Who of cinema.

BBC: Side By Side: Keanu Reeves examines the future of film