In all software and system development there are important constraints implied by the choice of languages, hardware, network topology, communications protocols and infrastructure, and so on.

在所有的软件和系统开发中都存在着通过语言、硬件、网络拓扑、通讯协议和底层架构等选择所带来的重要约束。

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There are certainly many business issues to be solved before you offer others access to services from your network, but let's focus on the technical issues behind this.

在您给他人提供对您的网络中的服务的访问权之前，无疑有很多业务问题要解决，而我们把重点放在这背后的技术问题上。

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From the network layer on through each tier of the environment, there are a multitude of configuration items that can impact the environment.

从网络层一直到环境的每一层，存在许多可以影响环境的配置项。

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Network Rail, responsible for running the railways, says there are currently 7, 993 level crossings on the network.

BBC: NEWS | UK | Axing crossings 'not practical'

There are already examples of tolls on the UK road network, such as the London congestion charge and at the Dartford Crossing.

BBC: Road pricing: More new roads could be funded by tolls

So what Christy talked about in this answer was there are -- and I think what any economist -- I'm sure there are many on your network that would tell you it's likely the next time this board meets that they'll affix a date to the end of a recession from a statistical economic viewpoint that they're charged to do.

WHITEHOUSE: Press Briefing