warn，warning admonish，[军]be on the alert against，guard against，alertness ；

warn，caution，admonish，warning，admonition ；

[例句] 那名司机设法从车里逃了出来并大声警告别人。 The driver managed to escape from the vehicle and shout a warning.

[例句] 电视台受到警告，要求对暴力场面的描绘采取谨慎态度。 Television broadcasters were warned to exercise caution over depicting scenes of violence.

alarm，warning，alert，alarm signal，larum ；

[例句] 一旦发现有泄漏，警报就会响起来。 Any escape, once it's detected, sets off the alarm.

[例句] 他听见警报响了。 He heard the alarm go off.

police，policeman，cop，bobby，constabulary；

[例句] 然后他反扭住那名男子的手臂让他动弹不得，直到警察赶到。 He then held the man in an armlock until police arrived.

[例句] 人群变得狂暴起来，并向警察投掷汽油弹。 The crowds became violent and threw petrol bombs at the police.

vigilance，alertness，be on the stick，get up early，have one's wits about one ；

[例句] 那样的一次失败会令你警觉起来，开始思考。 A defeat like that makes you sit up and think.

[例句] 我尽量不让自己紧张，或者表现得非常警觉。 I tried not to tense up, or become obviously wary.

(security) guard，safekeeping，[电影]Karaul；

[例句] 只有一名穿制服的无聊警卫可能偷听到了他们的谈话。 Only a uniformed guard stultified with boredom might have overheard them.

[例句] 他说警卫会无缘无故殴打他们。 The guards, he said, would punch them for no reason.

be on guard against，watch out for，be vigilant，be on the alert，guard ；

[例句] 银行家们对结果保持高度警惕。 Bankers are keeping a wary eye on the outcome.

[例句] 这个年纪不大的孩子为此始终保持警惕。 To this end the young child is forever watchful.

alert，sharp-witted，vigilant，as sharp as a razor，canniness ；

[例句] 他的眼睛机警而又狡诈。 He had wary, foxy eyes.

[例句] 吉尔会发现你的秘密——她很机警! Jill will find out your secret — she never misses a trick!

alarm bell，tocsin，fire alarm ；

[例句] 威斯敏斯特的警钟已开始敲响。 Alarm bells are beginning to sound at Westminster.

[例句] 在某种程度上说, 你犯那个错误我 倒 感到高兴, 因为它可以对你敲警钟. In a way, I'm glad you made that mistake, for it will serve as a warning to you.

[美] policeman，constable，cop，peeler ；

[例句] 在彼得斯堡，过去5年中有30名巡警死于暴力事件。 In Petersburg, 30 patrolmen have died violently in the past five years.

[例句] 公路巡警关闭了这条路。 Highway patrol officers closed the road.

fuzz，[法] police constable，[电影]Polisse；

[例句] 值夜班的警员准备打卡下班。 The Night Duty Officer was ready to clock off.

[例句] 警方承诺向所有警员提供均等机会。 The police force is committed to being an equal opportunities employer.

alguazil，constable，police offcer，cop，lawman ；

[例句] 他1977年因冒充警官而再次入狱。 He was returned to prison in 1977 for impersonating a police officer.

[例句] 两名警官正在接受检察官的审查。 The two officers were being investigated by the director of public prosecutions.

spontoon，baton，espantoon ；

[例句] 一名守卫用警棍敲打金属扶手。 A guard raps his stick on a metal hand rail.

[例句] 暴乱中，警察挥舞着警棍对人群发起冲击。 Police in riot gear baton-charged the crowd.

aphorism，epigram，apothegm，mot，quirk ；

[例句] 那位老学者的文章里总是有很多名言警句. The old scholar's writing is always full of tags.

[例句] 他不断追求漂亮警句的手法则很容易使人厌倦. His ceaseless straining after brilliant epigrams quickly becomes irritating.

police dog，patrol dog，sleuth，sleuthhound ；

[例句] 包括蛙人和警犬训练员在内的50名警官正展开对她的搜寻。 Fifty officers, including frogmen and dog handlers, are searching for her.

[例句] 一只警犬嗅出了凶手的气味。 A police dog picked up the murderer's scent.

[医]Watchman ；

[例句] 总统有六名警卫员时时刻刻在左右保卫. The President always has six bodyguards in close attendance.

[例句] 警卫员把犯人捆起来,并在他们嘴里塞上布条. The guards tied up and gagged the prisoners.

[法] cordon，picket line ；

[例句] 他在突破警戒线后被一名警察拦截了。 He was rugby tackled by a policeman after breaking through police lines.

[例句] 一列拖拉机突破了警戒线，隆隆响着驶上了高速公路。 A line of tractors rumbled onto the motorway through a cordon of police.

[法] police sergeant ；

[例句] 之后你就可以回家，看彩色版的电视连续剧《摩斯警长》。 You can go home afterwards and watch Inspector Morse in colour.

[例句] 他在机场被一名助理警长扣留了。 He was stopped at the airport by an assistant superintendent of police.

siren，[机] alarming apparatus，annunciator ；

[例句] 在部门总部和警察局之间连有警报器。 An alarm links the police station to the divisional headquarters.

[例句] 消防车正要停下来，警报器发出刺耳的声音。 The fire engines were just pulling up, sirens blaring.

police；

[例句] 她的助手被警方指控犯有盗窃和欺诈罪。 Her assistant was accused of theft and fraud by the police.

[例句] 两名男子昨天夜里在索尔兹伯里接受了警方盘问。 Two men were helping police with their inquiries at Salisbury last night.