macOS only. Windows and Linux ship different fonts with different glyph tables. Cross-platform scoring would require running on each OS or using freely distributable fonts.
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.
，更多细节参见im钱包官方下载
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