To restore hearing, researchers still have to figure out how to produce millions of hair cells, prevent stem cells from forming tumors, and translate the work to human cells.

为了重建听力，科学家们还必须研究出如何大量生产毛细胞，如何避免干细胞形成肿瘤，以及如何应用于人类的细胞。

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And that is the example we have set by acting aggressively to restore growth, to prevent a deeper recession and to save jobs for our people.

我们通过果断行动恢复增长，防止进一步衰退，保障人民的工作机会，发挥了典范作用。

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The key now is to restore confidence in their debt market to prevent contagion spreading from the small peripheral countries to the core euro zone economies.

现在的关键是要重振对欧洲债市的信心，防止危机从欧元区的边缘小国扩散至欧元区核心经济体。

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Together, we have taken steps to stimulate growth, restore the flow of credit,open markets, and dramatically reform our financial regulatory system to prevent such crises from occurring again - steps that will lead to job creation at home,".

VOA: standard.2009.04.11

The SEC must take action to prevent another Twitter crash and restore faith and confidence in the markets.

FORBES: The "Twitter Crash" Is "Flash Crash" Redux

Such reforms may help to restore confidence and to prevent future mis-selling.

ECONOMIST: The economy

This stimulation involves the burning of moxa (mugwort) or the insertion of needles into points on these channels, with the aim to restore the bodys balance and prevent and treat disease.

UNESCO: Culture