That was Homeland Security Secretary Janet Napolitano, announcing a higher level of government action.

VOA: special.2010.05.01

I don't know, just a national security level.

我说不好，大概是关于国家安全的事情。

理想是当密码专家 - SpeakingMax英语口语达人

Ambassador Rice said she expects a large number, if not all, of the 15 Security Council members to be represented at the head of state or government level.

VOA: standard.2009.09.02

On the eve of the football Confederations Cup, the head of the South African Organizing Committee, Danny Jordaan, once again patiently responded to nagging inquiries over the level of security for the tournament.

VOA: standard.2009.06.12

"He wants to have a thorough discussion with the president and the rest of the national security team about whether that does remain the best way to pursue our enemies in Afghanistan, and ultimately bring a level of peace and security there, so that it no longer poses a threat to us,"

VOA: standard.2009.10.01