In the United States in 2009, new recommendations on mammograms by a government appointed panel of experts fueled a controversy around breast cancer and how to prevent it.

VOA: standard.2009.12.25

Nobody knows how bad the mortgage crisis is going to get but Ben Bernanke thinks that it's so important that we prevent a collapse that we should take that risk.

没有人知道抵押危机,到底会有多坏的影响，但是本？伯南克认为,预防承担那个风险所带来的暴跌,是非常重要的。

耶鲁公开课 - 金融市场课程节选

"The only way we can get rid of it is to tell the people how to prevent themselves and how to get rid of the disease,".

VOA: standard.2009.04.25