This paper studied the protection mechanism for virtual ring in mesh topology, and analyzed a construction algorithm for a virtual ring based on spanning tree.

文章对网状拓扑中的虚环保护机制进行了研究，并对一种基于生成树的虚环构成算法进行了分析。

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It then discusses the structured specification style and the transition oriented speciflcation style, which is based on an example of a virtual ring mutual exclusion protocol.

着重以一种虚环互斥协议为例，对结构化形式描述风格和转移形式描述风格进行探讨。

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And mobile shoppers are buying high-ticket items like diamond rings and cars, not just virtual goods and ring tones.

移动购物者已开始购买像钻戒和汽车之类的高价商品，而不仅仅是虚拟商品和铃声。

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No other virtual currency will even come close to that kind of vibrant liquidity and building walls to ring fence a virtual environment will turn out to be a counter-productive strategy.

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In effect, the token would act as a keychain for a ring of virtual keys.

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Linktone sells ring tones, virtual pets and other forms of wireless content over mobile phones.

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