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。
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。
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。
The performance improvement is due to the reduction of Translation Lookaside Buffer (TLB) misses, which occurs because the TLB can now map to a much larger virtual memory range.
性能之所以得到了改进，是因为提高了TranslationLookasideBuffer (TLB)的命中率，这是因为TLB可以映射到更大的虚拟内存范围。
According to the MOV reduction theory, the identity-based encryption scheme which is based on the bilinear map will lose the high efficiency of elliptic curve.
根据MOV归约理论，采用双线性映射构造的基于身份加密方案使得该方案不具有椭圆曲线高效的优点。
And flood risk map contains comprehensive information such as area nature, socio-economy and flood calamity, so it can play an important reference role in flood prevention and reduction.
洪水风险图综合自然、社会经济和洪水灾害等多种信息，在防洪减灾中可发挥重要参考作用。
And flood risk map contains comprehensive information such as area nature, socio-economy and flood calamity, so it can play an important reference role in flood prevention and reduction.
洪水风险图综合自然、社会经济和洪水灾害等多种信息，在防洪减灾中可发挥重要参考作用。
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