Whether private bodyguard can fall into the security guarding service company's business range has been argued all along.

私人保镖能否纳入保安服务公司的业务范围一直颇具争议。

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An alarm system for security guarding designed with FPGA is discussed in this thesis, and the theory and structure as wall as the design for VHDL module are also given bellow.

文中讨论利用FPGA设计的用于安全防范的报警系统，讲述系统的原理与结构，给出VHDL的模块设计。

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But in practice the guardians of Internet security seem badly to need guarding themselves.

但实际上，这些互联网安全的捍卫者们急需捍卫自己的安全。

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He says security forces where being extremely careful in launching the final raid because a suicide bomber was guarding the hostages in a corner of the building.

VOA: standard.2009.10.11

Zahir said four Nepalese Gurkha security guards guarding the IOM compound were also wounded in the attack.

WSJ: Taliban Assault Shakes Kabul

It saw much of Dhaka, a teeming and congested city, disguised as Pyongyang, with well-swept streets, fairy-lights on the road-dividers and 40, 000 security officers guarding the visitors.

ECONOMIST: South Asia's jinxed club

Analysts say such a shutdown could cut production in Nigeria, Africa's largest oil producer, by one-quarter within weeks or sooner if security forces guarding the facilities sympathize with union demands.

WSJ: Nigeria Torn by Rising Religious Violence