This paper discusses some internal and external grid systems, as well as the feature, scope and environment restriction of the grid systems.

本文分析了国内外的一些网格系统，以及网格系统的特性、应用的范围和大环境对网格技术应用的制约。

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Agile development has a useful concept called a spike: a small experiment done to prove something a developer has never done before to understand the full scope of a certain type of feature.

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