The robbers got into the bank by masquerading as security men.
劫匪假装成保安人员进入银行。
All the people who know this secret represent a security risk.
凡是知道这个秘密的人都对安全造成危险。
The airport authorities have promised to review their security measurements.
机场当局已答应重新检查他们的安全措施。
