Mr Obama hopes to buy time by dissuading Russia from delivering a missile-defence system that Iran has ordered and whose deployment could precipitate an Israeli attack on Iran’s nuclear sites.
奥巴马希望通过俄国来劝阻伊朗建立导弹防御系统来拖延时间，而且俄国的部署将会促使以色列向伊朗核地区发起进攻。
Mr Obama hopes to buy time by dissuading Russia from delivering a missile-defence system that Iran has ordered and whose deployment could precipitate an Israeli attack on Iran's nuclear sites.
奥巴马希望通过俄国来劝阻伊朗建立导弹防御系统来拖延时间，而且俄国的部署将会促使以色列向伊朗核地区发起进攻。
India has these aircraft since 2002 whereas the PAF has no effective weapon system to save major cities of the country and defence installations from any attack by such planes, the official said.
印度自从2002年就拥有上述战机，然而巴基斯坦空军却不具备有效的能保护主要城市和设施的武器系统，以防卫这些战机发起的攻击，该官员解释说。
A strong defence system offers protection from sudden attack by the enemy.
坚固的防御系统提供保护以防备敌人的突袭。
The economic losses brought with network attack is also serious, this makes people have to aggravate the more regard the research for network safe defence system and corresponding technology.
由网络攻击而带来的经济损失也越来越严重，这促使人们不得不越加重视对网络安全防御体系及相应技术的研究。
Besides that, we investigate several kinds of popular DNS attack methods, and proposed some defence schemes to resist these attacks and improve the robustness of the DNS system.
随后，本文研究了现阶段流行的针对DNS系统的几种典型攻击手段，提出了几种防范攻击和提高DNS系统健壮性的方案或方法。
Besides that, we investigate several kinds of popular DNS attack methods, and proposed some defence schemes to resist these attacks and improve the robustness of the DNS system.
随后，本文研究了现阶段流行的针对DNS系统的几种典型攻击手段，提出了几种防范攻击和提高DNS系统健壮性的方案或方法。
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