The need for stability and protection. From earliest times, communities have had to keep peace among their members, defend themselves against extra attack, and protect community assets.

稳定和保护的需要始自最久远的时期，人类团体不得不在其成员间保持和平，在外来进攻中进行自卫，并且保护团体的财产。

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In lab environment, we test the performance and the ability to keep up attack for prototype system.

利用实验室环境对原型系统进行了性能、攻击测试。

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In order to improve performance of resistance to the geometrical attack while keep invisible, a zero-watermark algorithm for digital image based on Fourier-Millin transforming is proposed.

为了提高抗几何攻击性能，同时保证不可见性，提出了一种结合傅立叶-梅林变换和零水印概念的图像水印算法。

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"In these gloomy times where unemployment benefits are, for a number of us, the only means to keep our heads above water, the attack on them today is a real catastrophe, " it said.

BBC: Artists stage a die-in in Avignon