Hadoop needs just a few pieces of information to answer my first and second questions: namely, which inputs to process and how to handle map and reduce.
Hadoop只需要几条信息就可以回答我的第一个和第二个问题：即，要处理哪条输入以及如何处理map和reduce。
The first is the original document, and the second is a hash map that is merged in with the original document before the updated document is stored in CouchDB.
第二个是一个哈希映射，在更新文档存储在CouchDB 中之前，会把该哈希映射和原始文档一起 merge 进来。
The first functional map call is executed for each slice of data and is shown below in Figure 19. The second argument in the call carries the index of the current slice
对于每个数据片，都执行第一个功能性映射调用，见图19。
The first line is the output of the Map object, and the second line is the UserInfo object reference.
第一行是map对象的输出，第二行是UserInfo对象引用。
The first image below shows a weight map and the second final result for stones and grass on the ground controlled by the same weight map.
下面的第一张图展示一个权重贴图，第二张展示了在同样的权重贴图控制下的地面上石子和草地的最终效果。
Since the fourth country is Entirely Neighboring to the first , second and third country, it causes the color number increased from 3 to 4 on the Topology Map.
第四个国家同国家一、国家二和国家三全相邻，这时它导致地图上的颜色数量从3增加到4；
Since the third country is Entirely Neighboring to the first and second country, it causes the color number increased from 2 to 3 on the Topology Map.
第三个国家同国家一和国家二全相邻，这时它导致地图上的颜色数量从2增加到3；
Since the third country is Entirely Neighboring to the first and second country, it causes the color number increased from 2 to 3 on the Topology Map.
第三个国家同国家一和国家二全相邻，这时它导致地图上的颜色数量从2增加到3；
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