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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。PG官网对此有专业解读
但记者走访发现，村民均表示从未有人收过自来水费。当地干部也无法提供水费收费标准及收费记录。
**Avoid patterns like:**
이정현 국힘 공관위원장 전격 사퇴…“제 생각 추진 어려워”