Third, security challenges.

第三，安全挑战。

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Security challenges and solution matrix.

安全方面的挑战和解决方案矩阵。

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On global security challenges, we've also made progress.

在应对全球安全挑战方面，我们也取得了进展。

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"President Obama embodies the new spirit of dialogue and engagement on the world's biggest problems: climate change, nuclear disarmament and a wide range of peace and security challenges,".

VOA: standard.2009.10.09

President Obama says the Summit of the Americas yielded broad hemispheric agreement on the need to spur economic growth, confront security challenges like drug trafficking, promote alternative fuels, protect the environment, and ensure human rights.

VOA: standard.2009.04.19

Department of Homeland Security Secretary Janet Napolitano says one of the biggest challenges is finding the right people to handle the job.

VOA: standard.2009.08.11

But the information industry is inherently fascinating beyond its unique legal, regulatory and security challenges.

FORBES: Welcome to Backslash

But the country still faces security challenges, as well as political, economic and diplomatic difficulties.

NPR: Petraeus: 'Long, Hard Slog' In Iraq

However, the war left Libya awash with weapons, adding to the country's security challenges.

NPR: Car Bomb Targets French Embassy In Libya