One type of external evidence that may shed light on the transmission of Roman texts is the availability of a work in the Middle Ages, when many classical texts were circulated.
当许多经典文本都在流传时，一种可能有助于罗马文本传播的外部证据是中世纪的一部作品。
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Comparing with the classical IP and taking the advantages of MPLS, this article brings forward a new method to resolve the delay in the real-time video transmission.