When the network become enough big, there are usually more than one shortest routes from the source node to some destination nodes, and therefore the SPT also will not be the only one.
当网络变得足够大时，从源结点到一些目的结点的最短路径常常不只一条，而由此构成的SPT也就不是惟一的。
When the network become enough big, there are usually more than one shortest routes from the source node to some destination nodes, and therefore the SPT also will not be the only one.
当网络变得足够大时，从源结点到一些目的结点的最短路径常常不只一条，而由此构成的SPT也就不是惟一的。
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