•The station was closed for two hours because of a security alert.由于有安全警报，车站关闭了两小时。

•Thirty demonstrators were killed in clashes with the security forces over the weekend.周末，30名示威者在与维安部队的冲突中丧生。

•The tighter security measures/precautions include video cameras in the city centre.加强安全保护措施包括在市中心安装摄影机。

•The students were deported because they posed a threat to national security.这些学生因对国家安全构成威胁而被驱逐出境。

•The proposed national identity card system would help to tighten security against fraud.拟议中的国家身份证系统将有助于加强安全保障，以防诈骗行为。

•The most dangerous criminals are held in maximum- security prisons (= prisons that are as difficult as possible to escape from).最为危险的罪犯被关押在戒备最森严的监狱里。

•You'll need to notify security if you want to work late in the office.如果想在办公室里工作到很晚，你需要通知警卫。

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•If it's a choice between higher pay and job security, I'd prefer to keep my job.如果在更高的薪资和安稳的工作两者之间进行选择，我宁愿保住工作。

•I'm on a temporary contract and have little financial security (= little certainty of having enough money to live on).我签的是临时契约，没甚么经济保障。

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•She used her shares in the company as security against a £23 million bank loan.她向银行所借的2300万英镑是以其公司股票作为抵押的。

•The hotel held onto our baggage as security while we went to the bank to get money to pay the bill.旅馆留下我们的行李作为抵押，我们则去银行提钱来付账。

•Most children need the security of a stable family life.大多数孩子需要安稳的家庭所带来的安全感。