这样可能会降低消息流的内存利用率。

This way memory utilization of the message flow can be reduced.

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SPE不能直接读取主存，相反地必须通过对内存流控制器(或mfc)的单元使用dma命令来在本地存储和主存之间导入和导出数据。

The SPE cannot read main memory directly, but instead must import and export data between the local store and main memory using DMA commands to a unit called the memory flow controller, or MFC.

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现在看看相反的过程，从数据流建立内存对象模型。

Now take a look at the the reverse process — building an in-memory object model from a data stream.

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