问答题

We hope that by observing the following points you will enjoy your visit to Christ Church without disturbing the life of the college. * Please obey all notices and do not enter the areas marked Private. * Please do not enter any college rooms. * Please avoid leaving litter (杂物) ; picnicking within the college is not permitted. * Please do not smoke. * Please do not gather so as to obstruct (阻塞) paths or passages, particularly in the Hall. * Please be as quiet as possible, remembering that this is a college where people are working. * In the event of a fire or other danger, or if you hear a fire alarm or warning, please leave the building without delay. At all times please follow the advice of the Custodians (保安人员) who are here to help you. * Closed circuit television surveillance (监视) is in operation. Images are being recorded for purposes of crime prevention and public safety. * Thank you for visiting Christ Church. If you have any comments please write to: The Steward, Christ Church, Oxford OX1 1DP Why is closed circuit television surveillance in operation To _____________________and ensure public safety.

【参考答案】

prevent crime