Precautions had to be taken to prevent pilfering.

应采取预防措施来避免偷窃。

《柯林斯英汉双解大词典》

They were trying to prevent an even worse tragedy.

他们正在设法避免更大的悲剧发生。

《牛津词典》

The security forces had to intervene to prevent the situation worsening.

那些安全部队不得不干预以阻止形势变得更糟。

《柯林斯英汉双解大词典》

If they had, they would have been tested to see if they needed treatment to prevent an infection like H.I.V.or hepatitis.

VOA: special.2010.02.10

It's contracting so the Fed is trying to prevent a serious recession by cutting interest rates; they've been cutting them rapidly.

它在减小,所以美联储正在试图阻止一个因为利率缩减,而产生的严重的经济衰退；,但是他们最近一直在降低利率。

耶鲁公开课 - 金融市场课程节选

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

Ratings would have to be confidential to prevent investors from free-riding on each other.

FORBES: Rethinking Credit Ratings

Is there anything you can do to prevent MRSA in any of its variants?

NPR: Tracking a New Strain of Drug-Resistant Staph

There is an effective way to prevent contamination of meat in our processing plants: irradiation.

FORBES: Fact and Comment