在映射过程中，主节点接收输入，把输入分割为更小的子任务，然后把这些子任务分布到工作者节点。
In the Map process, the master node takes the input, divides it up into smaller sub-tasks, and distributes those to worker nodes.
第二种方法是 分割数据以映射到一些关系表，这些表粗略地表示 XML 数据的结构。
Second, you could shred the data to map to relational tables that roughly represent the structure of the XML data.
新的开发队伍夜以继日地工作，破译代码然后映射代码，经过大量的规划与设计之后，人们将这些代码分割成碎片。
The new development team, working night and day, deciphers it, maps it, and after much planning and design, tears the code to shreds.
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