As an important force to maintain a steady society, police need to carry on kinds of special actions, organize safety security etc. besides daily works.

警察作为维持社会稳定的重要力量，除了日常工作之外，他们还需要根据治安形势，开展各种专项治理行动、组织安全保卫等。

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City dwellers know what this means in terms of social cohesion, safety, security, and the quality of life.

城市居民知道这对社会团结、安全、保障和生活质量意味着什么。

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The Participant pattern lets you make the transition from simple aspects to more complex ones such as those for transaction management, thread safety, security, etc.

Participant模式可以将简单的方面转换为更复杂的方面，如负责事务管理、线程安全、安全性等方面。

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"Safety and security of our volunteers is absolutely our top priority and we are continually looking at this topic and I have to say that in the last few years we have done an amazing amount of work to try to improve both our systems to support volunteers, to ensure confidentiality and to strengthen their preparedness and training."

VOA: special.2011.03.28

"The benefits in terms of ultimately adding to the safety and security of the American people would be marginal and questionable.

VOA: standard.2009.10.15

And again,it is two-fold: one is,we want to help our colleagues in Mexico, but it does have an impact on safety and security in the United States."

VOA: standard.2009.03.24

The U.S. Coast Guard will deploy a Maritime Safety Security Team, akin to a seaborne SWAT team, as well as the 87-foot cutter Albacore to patrol the Potomac River.

CNN: Security at record high for WWII Memorial ceremony

He obviously sets as his highest priority the national security of the United States, the safety and security of the American people both here and abroad, and our assets abroad.

WHITEHOUSE: Press Briefing

The President directed U.S. intelligence and law enforcement agencies and the Department of Homeland Security to take steps to ensure the safety and security of the American people and to determine whether these threats are a part of any additional terrorist plot.

WHITEHOUSE: Full Briefing on Security Alert