Intelligence to prevent attacks is part of what experts call a "layered" security approach.

防止袭击的情报是专家所说的“分层”保安措施的一部分。

youdao

Questions have also been asked about why Pakistan's powerful intelligence agencies failed to prevent attacks.

人们仍然在询问，为什么巴基斯坦强大的情报机构未能阻止袭击？

youdao

To prevent attacks, use mattress covers and pillowcase covers to make a barrier between dust mites and yourself.

要避免发作，可使用床罩和枕套物理隔开尘螨和自己接触。

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The United States is also offering support to other countries in the area to help prevent other attacks.

VOA: special.2010.07.17

"We are going to have to continue to work with our partners to prevent future attacks.

VOA: standard.2009.04.13

And,as I said,it would be tough for any government,any country, to prevent these kinds of attacks."

VOA: standard.2009.12.11

The government wants to know what the risks are and how to prevent attacks.

FORBES: Cyberattacks -- Is North Korea Already At War With Us?

We will ensure sound intelligence and tough new border controls to prevent attacks.

BBC: NEWS | UK | UK Politics | David Davis speech in full

Mr Straw pledged an investigation into the allegations, saying the UK Government would act to prevent attacks on either the Muslim or Jewish communities.

BBC: Straw briefed on mosque attacks