On December 31, a bomber in Baqouba detonated her suicide vest close to a police patrol, wounding five policemen and four civilians.

在12月31号，巴库巴的一名炸弹袭击者在一个警察巡逻队附近引爆了她的自杀式炸弹背心，造成5名警察和4名平民受伤。

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Two policemen were killed when gunmen opened fire on their patrol vehicle.

当持枪歹徒对巡逻车开枪射击时，两名警察中弹身亡。

《柯林斯英汉双解大词典》

However, no policemen were out on patrol or in their stations.

然而，加油站里没人，也没有警察巡逻。

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Only about 5% of policemen are on patrol at any one time, even though patrol officers account for over half the police force.

ECONOMIST: Jack Straw takes on the law

However, no policemen were out on patrol or in their stations.

NEWYORKER: The Autobiography of J.G.B.