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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2023年全国两会期间，有全国人大代表提到响水事故，“当时GDP上去了，但为若干年以后的灾害性事件埋下了根”。
Source: Computational Materials Science, Volume 266