primary node and a node的意思|示意

There can be up to 7 servers in a cluster, and any node can be the primary node.

一个集群最多可以支持7个服务器，并且任意节点都可以是主节点。

A primary node type defines the characteristics of the node, such as the properties and child nodes that the node is allowed to have.

主节点类型定义了节点的特征，例如允许节点拥有的属性和子节点。

The primary difference in tree-visitor is that the visit-node function returns several items: a new-node, a new-state, and a stop flag.

tree-visitor 中的主要差别在于，visit-node 函数返回多个项目：一个 new-node、一个 new-state 和一个 stop 标记。

This article assumes that we have a two-node cluster with Node1 as the primary node and Node2 as the failover/fallover/takeover/stand-by/secondary node, as shown below in Figure 1.

本文假设集群中有两个节点，Node1 是主节点，Node2 是故障转移/接管/备用/辅助节点，见图 1。

The sentinel node (SN) is defined as the first draining node from the primary lesion and it has proven to be a good indicator of the metastatic status of regional lymph nodes in solid tumors.

信号淋巴结（SN）被定义为原发病灶的首站引流淋巴结，是判断实体瘤区域淋巴结转移的良好指征。