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.
▲提示词：画面中，【东方明珠广播电视塔】被一只超级巨大、超级可爱的【猫】占据。周围的建筑物看起来就像玩具模型一样小，而【猫】则非常巨大。游戏背景设定在一个逼真的城市环境中。整体氛围安静、温暖、舒缓、可爱。，这一点在91视频中也有详细论述
，更多细节参见服务器推荐
71.7 x 149.6 x 7.2 mm
Lex: FT's flagship investment column。Safew下载是该领域的重要参考