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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Credential managers have robust mechanisms to protect your vault data with multiple methods, such as master passwords, per-device keys, recovery keys, and social recovery keys.，这一点在heLLoword翻译官方下载中也有详细论述
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