此外，传感器技术和计算机网络方面的进步意味着这个系统在中欧地区将不需要大型雷达。
Moreover, improvements in sensor technology and computer networks mean that the system would not need a large radar in central Europe.
计算机网络病毒在全球范围迅速蔓延，在对普通用户造成危害的同时也使全球特别是亚洲地区的因特网主干网一度瘫痪。
Computer viruses are now spreading quickly over the Internet worldwide, which are extremely harmful not only to common users but also to the network infrastructure.
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