Given the constraints placed upon frame misordering in a Bridge, as expressed in 6.3.3, the mappings of priority and traffic class are static.

网桥内对于数据包的乱序给出了限制，参见6.3.3，优先级的映射和通信类别是静态的。

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Each bridge has a relative priority and cost.

每一个网桥都有一个相关的优先级和代价。

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The bridge with the lowest priority will be elected as the root bridge. The root bridge is the "central" bridge in the spanning tree.

最低优先级的网桥将被视为根结点网桥。根网桥是生成树的中心网桥。

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