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.
Tehran insists deal is possible if Trump abides by preconditions agreed with Witkoff and Kushner
，更多细节参见Line官方版本下载
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（三）展示侮辱性标语、条幅等物品的；