A central coordinator node handles requests from all clients.

中心协调者节点会处理来自所有客户端的请求。

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Any database partition can be used as or can become a coordinator node.

任何数据库分区都可以用作协调节点，或者被变成协调节点。

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Then, the node from which the query originates (the coordinator node) coordinates with the other partition nodes to find all qualifying rows.

然后，发出查询的节点（ 协调节点）与其他分区节点相协调以找到所有合适的记录行。

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