"I think we are not in a war with the settlers, and we should do everything we can in order to reach an agreement in order to prevent any kind of deterioration in the region,".

VOA: standard.2009.12.21

It's a mechanism that they have evolved in order to prevent foreign genes from entering a cell and being expressed.

它们进化出这种机制来,防止异源基因进入细胞并表达

耶鲁公开课 - 生物医学工程探索课程节选

As we'll see in section today, a vaccine does not have to be totally perfect in order to prevent transmission of a disease, because when a disease enters a community its spread from one person to another.

有如我们今天看到的,疫苗不一定非要,绝对完美地阻止疾病的传播,因为当疾病侵入一个社区后,会在人群间传播

耶鲁公开课 - 生物医学工程探索课程节选

"General McChrystal and the NATO investigators should bear this fact in mind that regardless of the support to the Taliban, those killed were non-combatants and their killing was a violation of the tactical order General McChrystal issued a few while ago in order to prevent such incidents,".

VOA: standard.2009.09.07

In order to keep the currency convertible they had to keep interest rates high to prevent people from demanding the gold.

为了保持货币的转换性,他们不得不将利率提高,以防人们向他们索求金子的兑换。

耶鲁公开课 - 金融市场课程节选

It says it will stop censorship once order has been restored and media reforms in place to prevent abuses.

VOA: standard.2010.07.06