Although this strong signal was never positively identified, astronomers have identified in it many attributes characteristic of a more mundane and ultimately terrestrial origin.

虽然这道强烈的信号从来没有被验明正身，但天文学家发现它在许多属性上更像是我们的世界中的，最终来源地可能是地球。

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But in the back of this rectangle, its light's origin shows face and changes little by little into another characteristic thing.

但是在这个矩形的背后，光源初露真容，并且渐渐地显示出另一番特点。

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The article introduces the origin, concept, characteristic and service application of virtual routers in ATM exchanges and also brings up a specific case of service applications.

介绍了在AT M交换机上虚拟路由器技术的由来、相关概念、技术特点、业务应用等，列举了一个具体的业务应用实例。

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