They got in disguised as security guards.

他们装扮成保安人员混了进去。

《牛津词典》

Security guards make regular patrols at night.

夜间保安人员定时巡逻。

《牛津词典》

Fans may undergo body searches by security guards.

仰慕者们可能要接受保安人员的搜身。

《柯林斯英汉双解大词典》

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

It will house 8,000 people in tents. Fifty security guards will be on duty around the clock.

VOA: standard.2010.03.29

Samurai once lived in Buddhist temples here, Nagashima explained, working as security guards called boukan.

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The theft occurred despite "large security measures", including 80 security guards, the jeweller said.

BBC: Second jewel theft strikes Cannes film festival

Security guards are keeping people away from the street, and shops have been closed.

BBC: Forensics investigators decode the Boston bombings