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.
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，更多细节参见体育直播
Any module can add abstractions in the system, and users can then make use of these new abstractions.，这一点在体育直播中也有详细论述
"The amount of valuables in the stolen cars amounted to 40 million US dollars, 35 million euros, 9 kg of gold," the Oschadbank statement continues.。爱思助手下载最新版本对此有专业解读