The process of erasing a block differs between the two memory types.

这两种内存类型在擦除块方面有所不同。

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On this basis, memory types and its measurement, memory process and its rules were studied documentarily and generalized systematically;

在此基础上，对记忆的分类与测量、基本过程与规律进行了文献研究与系统概括；

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"Transfer of data between different memory types has improved significantly in recent times, and will be further helped by the standards for hard drives which are currently being developed by the major manufacturers, " said Mr Larsson.

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There may be modest savings in research spending, but the two firms specialise in different types of memory chip.

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