求英文翻译，50分，翻译好了可再追加50分！不要机器翻译的！

In information age hold key position today, do the people face are being how fast, gain the information effectively. But computer network's development, promoted the people to gain the information quantity and the speed. The computer network was the product which the computer technology and the communication unified, the network already entered from the laboratory to people's daily life, became of the people to study, one of work and life basic tools. The local area network is computer network's important form, expands the local area network to receive people's welcome. This article is carries on the expansion with the low-cost several kind of commonly used equipment to the common several kind of local area network. First, introduced local area network's related knowledge; Then carries on the expansion to the simple common local area network, finally the prospect which expands to the local area network has given the affirmative forecast.
局域网；Local area network
拓扑结构；Topology
局域网的物理扩展
Local area network's physics expands

Abstract: In the information age occupy an important position today, people faced with how fast and effective access to information. And the development of computer networks, on the promotion of a number of people access to information and speed. Computer network is the computer and communication technology the result of combining, the network has from the laboratory into the people's daily lives, as people learn, work and life of one of the basic tools. LAN is an important form of computer network, LAN extension of the more welcomed by the people. This paper is to use the cheaper prices of several commonly used equipment on some common local area network expansion. First of all, on the LAN-related knowledge and the simple common LAN expansion, the final extension of the LAN to the prospects of a positive outlook.
Key words: LAN; topology; LAN extension of the physical

Abstract: In information age hold key position today, do the people face are being how fast, gain the information effectively. But computer network's development, promoted the people to gain the information quantity and the speed. The computer network was the product which the computer technology and the communication unified, the network already entered from the laboratory to people's daily life, became the people to study, one of work and life basic tools. The local area network is computer network's important form, expands the local area network to receive people's welcome. This article is carries on the expansion with the low-cost several kind of commonly used equipment to the common several kind of local area network. First, introduced local area network's related knowledge; Then carries on the expansion to the simple common local area network, finally the prospect which expands to the local area network has given the affirmative forecast. key word: Local area network; Topology; Local area network's physics expands

好不容易翻完了
可累死了
Summary: Nowadays information has been occupying an important position. People are bothered by how to get information quickly and effectively. This problem is being solved by the development of internet work by enhancing the amount and speed of getting information. Internet work is the combination of computer and communication technique, which has come out of the laboratory and into the daily life of people, as the fundamental tool of people’s study, work and life. The LAN (Local Area Network) is an important form of network. The Extended LAN is more welcomed by people. This essay illustrates some methods to utilize the inexpensive equipment to extend the usual LANs. First , it tells some related information about LANs, then extend the usually-seen LANs. Eventually give some positive points about the future of the Extended LAN.

Key Words: LAN (Local Area Network) , Topo Construction; the physic extension of LAN

Abstrct:Summary: Occupy today of the important position at information age, how people face to obtain information fast, effectively. And the development of computer network, promote people to obtain quantity and pace of information. The computer network is the result that the computer technology combined with communication, the network has already entered daily life from the laboratory, has become people to study, one of the basic tools of work and life. The LAN is the important form of the computer network, expand the LAN and is well received by people even more. This text expands several kinds of common LANs with several kinds of cheap daily apparatus of price. First of all, have introduced the relevant knowledge of the LAN; Then expand the simple common LAN, the approving prospect that the LAN expands prospect finally. Keyword: LAN; Topological structure; Physics of the LAN is expanded