The advantage of MapReduce is that it allows for the distributed processing of the map and reduction operations.

MapReduce的优点是它允许对映射和缩减操作进行分布式处理。

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Map and reduce are named after functions in functional programming but provide the core capability for data reduction.

map（映射） 和 reduce（缩减） 源自函数式编程中的函数名，但是这个应用程序的核心功能是数据缩减。

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Not only are mapping and reduction amenable to parallelization, but the map and reduce operations can be combined into a single parallel pass, which is even more efficient.

不仅映射和减法支持并行化，映射和减法运算也可结合到单个并行循环中，这样效率更高。

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