传统网络设备的供电都需要本地交流电源来提供电能，不但增加了网络基础建设的成本，而且网络设备还可能受到电网掉电的影响。
The power supply for traditional network equipment all need local AC power source, which increases the cost of network base construction and may affect the network equipment once the power is cut off.
使用火车网络是很可行的，特别是欧洲内部的城市之间旅行或者是像日本那样基础建设优良和火车可靠的地方。
Using the train network is a viable option, especially if journeying city-to-city within Europe and places like Japan where the infrastructure is good and the trains are reliable.
Skype本身就是一项核心的、基本的基础建设网络架构。
Skype itself is one of the core, fundamental infrastructure Internet services.
Skype本身就是一项核心的、基本的基础建设网络架构。
Skype itself is one of the core, fundamental infrastructure Internet services.
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