With multicore processors bringing parallel computing to the masses, there is an urgent need to make concurrent programming easier.

多核处理器会引爆并行计算，因此当务之急是降低并发编程的难度。

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In network computing environments, as large number of concurrent user access Shared database, the database servers often become performance bottlenecks.

在网络计算环境下，当大量客户同时存取数据库资源，数据库服务器常成为性能瓶颈。

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Then people suddenly thought of a good way: gather together all of the computing resources as a whole (a cloud), through the concurrent use of resources to complete the operation request.

于是人们突然想到了一个好办法：把所有计算资源集结起来看成是一个整体(一朵云)，通过并发使用资源完成操作请求。

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