Lately, however, twin studies have helped lead scientists to a radical new conclusion: that nature and nurture are not the only elemental forces at work.

然而，近日的双胞胎研究帮助科学家们得出了一个全新的结论：先天和后天因素不是唯一起作用的因素。

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In 2012, however, the hull shape was at the centre of the work, so modern power tools were used to carve the oak planks, before turning to prehistoric tools for finishing.

然而，在2012年，船体形状是这项工作的中心，所以现代电动工具被用来雕刻橡树木板，然后再用史前工具进行修整。

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However,it was only the sound of John Henry at work.

VOA: special.2009.02.21

When other factors are at work, however, American companies may find themselves on the receiving end of large orders from China.

FORBES: Boeing Flies The Friendly Skies Of China

Shallow visual preferences are not the only dynamic at work, however.

CNN: Chris Christie's weight: Why it matters

Something else appears to be at work here, however.

CENTERFORSECURITYPOLICY: Khan Job