其实，与他之前的虚拟世界相比，SL的经济和流通管理相对严格。
In fact, compared with other virtual worlds before it, Second Life's economy and its currency have been tightly managed.
在这令人疯狂着迷的虚拟世界中，游戏币的流通已经形成了一定的市场。
逻辑链路是一条信息可以双向流通的虚拟电路。
A logical link is a virtual circuit on which information flows in two directions.
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