One guard tried to close a barrier that had been pushed open, but it was too late.

一个边防兵试图合上被推开的路障，但是太晚了。

youdao

In addition, the museum had reduced its security personnel, meaning that often there was only one guard on duty.

另外，博物馆已经裁减了其安保人员，这意味着通常只有一名警卫在值班。

youdao

At midnight there were four guards at the front gate of prison 888, and there was one guard at the back gate.

午夜时分，888号监狱正门前有四个卫兵，还有一个卫兵守在后门。

youdao

The Coast Guard Academy can have thirty-five international students at any one time;

VOA: special.2009.06.04

One other very important thing to understand about this defensive problem and this is one of the debatable issues between the old guard and the traditional interpretation; I'm still giving you the traditional view.

对于防御的问题还有另外一个很重要的因素,这也是老顽固们对传统观点,争论的一个话题,我还是采用传统观点的说法

耶鲁公开课 - 古希腊历史简介课程节选

After the doctor visits, Jackson would be "out of it and sedated, " one guard said.

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The wards at the jail, which houses roughly 12, 500 inmates, typically have 20 cells and only one guard.

WSJ: Suspect in India Rape Case Found Dead

No-one had beaten her up, she wrote, and one guard gave her a pep talk when she was crying in her cell.

BBC: Amanda Knox and prison life