My main responsibility as security inspector is checking on guards.

作为安全检查员，我的主要责任是检查那些值班人员。

youdao

This was often dangerous, because guards on the train would throw the men off or arrest them.

VOA: special.2010.06.13

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

VOA: standard.2010.03.29

The situation in the West African country remains volatile, after presidential guards opened fire on tens of thousands of pro-democracy protesters on September 28.

VOA: standard.2009.10.16

Despite the massive security at Woodhill, there have been numerous assaults on guards who at times have had to put on full riot gear.

ECONOMIST: Prisons

Also on Wednesday, security guards on the seventh floor of the hospital where Mr Berlusconi was staying apprehended a man who said he wanted to speak to the prime minister.

BBC: Italian PM Silvio Berlusconi leaves hospital

Walkie-talkies crackled, a police helicopter hovered overhead and acres of day-glo clothing were apparent on the guards monitoring the perimeter.

BBC: Fortress security for GM wheat trial