The network layer, however, provides a hop-by-hop protocol and is used on the two end systems and every intermediate system.

但是网络层提供跳跃点到跳跃点的协议，所有端系统和中间系统都需要使用。

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Beginners and intermediate system administrators will benefit most from this article; the explanations and examples assume you can handle most beginner-level system admin concepts.

初学者和中级系统管理员将从本文获益最多；解说和示例假设您可以运用大部分初学者级别的系统管理概念。

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It's a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time.

这是一个复杂的系统，数据被复制到多个中间设备，通常是为了在数百万人同时试图访问服务时加快文件访问速度。

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But such a state of general unemployment is something rather exceptional, and it is by no means evident that a policy which will be beneficial in such a state will also always and necessarily be so in the kind of intermediate position in which an economic system finds itself most of the time, when significant unemployment is confined to certain industries, occupations, or localities.

FORBES: Hayek: "General Unemployment" Requires Easy Money

As you deploy more capability, interceptor capability and more ships with radars, the ability to protect more and more of Europe will increase with the threat moving from short- to medium-range missiles today to intermediate-range ballistic missiles, and in phase four of our system to intercontinental ballistic missiles by 2020.

WHITEHOUSE: Press Briefing on NATO Defense Capabilities

The latter is a road-mobile system that nominally carries only one warhead but which is like its intermediate-range predecessor, the SS-20 eminently capable of lofting up to three warheads.

CENTERFORSECURITYPOLICY: Center for Security Policy | Scowcroft Is Partly Right: The Administration Should Start Over On Mobile ICBMs