The digging had left a network of abandoned mines and tunnels.
挖掘留下了满地密布的废弃矿井和隧道。
On a network not using NetBIOS, the session layer is simply left out.
在不使用NetBIOS的网络上，会话层将被简单地省略。
The figure on the left illustrates a network structure.
左图显示了网络结构。
The figure on the left illustrates a network structure.
左图显示了网络结构。
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