You could begin with a lighting starter kit and add on security devices later.

你应该先从照明工具包入手，然后再安装安全设备。

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As a result, these add-on features end up being more of a reliability mechanism than a security mechanism.

结果，与其说这些添加的功能部件是安全性机制，不如说它们是可靠性机制。

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On the other hand it will add to the security of China's neighbours.

另一方面，它将提升中国邻邦的安全。

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But why would Intel spend so much on McAfee to add security features to its chips, rather than buying a smaller company with strong technology?

WSJ: HEARD ON THE STREET: Intel's Security Glitch

Heathrow airport officials say they hope to resume normal service on Friday, but add that security restrictions will remain in force for the foreseeable future.

NPR: U.K. Uncovers 'Advanced' Bomb Plot; U.S. Targeted

The municipalities hosting two New York City-area marathons Sunday will add police and clamp new security measures on runners and spectators following last month's bombing at the Boston Marathon.

WSJ: New York Area Races Increase Security After Boston Marathon Bombing