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But a Cardiff-based company is a step closer to making this a reality.，这一点在51吃瓜中也有详细论述
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03 全球格局已定中美两条路，两种未来，更多细节参见爱思助手下载最新版本
The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.