为了实现服务器间的通信，每个服务器都包含一个或者多个网络接口卡(NICs)，它们连接到一个外部网络设施上。

To enable communication among the servers, each server includes one or more network interface CARDS (NICs) that attach to an external networking infrastructure.

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根据美国图书馆协会的统计数据，美国60%的图书馆存在宽带网络网速不足的问题，而且目前这些图书馆普遍缺乏足够的资金来对自己的网络设施进行改善升级。

According to the American Library Association, 60% of U.S. libraries report having "insufficient" broadband speeds, but libraries are currently being underfunded.

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用户规模的扩张，又要求网络等基础设备的规模不断扩大、更新、改进，从而带动对网络设备的需求以及与网络设施相关的工程建设。

The growth of users in turn requires networks and the infrastructure to expand, upgrade and improve, driving the demand for network equipment and the construction of network-related facilities.

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Although people have accessed the site from 177 different countries there are plenty of remote villages and other locations that just don't have the network infrastructure needed to be able to truly access all the depth in open course ware.

尽管人们从177个不同的国家,进入到这个网站,但是还有很多遥远的村落,等其他地区没有,接触该网站的必要的,基础网络设施。

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