NATO fighters guard the Baltic nations' airspace and perform the peacetime air defense and air policing function.
北约派战斗机守卫波罗的海领空，负责防空和维持治安。
To guard yourself against XSS attacks, filter your input through the htmlentities() function whenever the value of a variable is printed to the output.
要防止受到 XSS 攻击，只要变量的值将被打印到输出中，就需要通过 htmlentities() 函数过滤输入。
This paper introduces the design principle, the system structure , the application function of digital video monitoring system in the university safe guard management.
本文介绍了应用于高校安全防范管理的数字视频监控系统的设计原理、体系结构和应用功能。
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