While the identity authentication technology are network security and information system security the first barrier, it is time network information security technology a very important research field.

而身份认证技术是网络安全和信息系统安全的第一道屏障，它是网络时代信息安全技术非常重要的一个研究领域。

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First-class passengers enjoy "élite" security lines and priority boarding, and disembark before the unwashed in coach, held at bay by a flight attendant, are allowed to foul the jet-way.

头等舱乘客享受“精英”安检通道，能优先登机，并能在被空乘人员管辖的经济舱普通民众“弄脏”移动通道之前，优先下飞机。

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Staff at the Moche police station first noticed Victor Martin late last month, while checking security cameras.

莫切警察局的工作人员上月底在检查监控摄像时首次注意到维克托·马丁。

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In India,he became the first American president to openly support a permanent seat for that country on the United Nations Security Council.

VOA: special.2010.11.13

This week,the Obama administration released its first National Security Strategy.

VOA: special.2010.05.29

The eyewitness says the two vehicles first attempted to enter through the airport, but were refused access by security guards.

VOA: standard.2009.09.17

Delta described the security bars as the first phase of the aviation industry's broader plan to bolster cockpit security.

CNN: Airlines move swiftly to secure cockpits

Rice served under President George W. Bush as the first female national security adviser and the first African-American woman to hold the post of secretary of state.

CNN: Augusta National Golf Club admits first female members

Equity is the lowest tranche of such a security and thus the first to experience losses if a security fails.

FORBES: Goldman Hopes To Avoid Fraud Charge In Any SEC Deal