此外，很难否定这个结论，就是各州之间有关房屋成本的变化，虽然扮演着重要的角色，然而肯定不是唯一起作用的因素。

Moreover, it is hard to avoid the conclusion that changes in relative housing costs between states, while certainly not the only factor at work, have played an important role.

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然而，HBS在使好理念真正起作用方面扮演最关键的角色。

Nevertheless, HBS plays a vital role in making good ideas stick.

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扮演角色；在……起作用。

Pictures play an important part in publishing.

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