隐藏文件的展示策略也是影响用户感知的关键因素。macOS 默认不显示以点号开头的文件，而在 Windows 上，用户开启「显示隐藏文件」后即可看到 .DS_Store。但「显示隐藏文件」并不会展示 Desktop.ini，因为后者还被标记为「受保护的操作系统文件」，需要更深层级的设置才能取消隐藏。因此，如果用户经常在 macOS 与 Windows 间交换数据，对 .DS_Store 文件的感知还会更加强烈。
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The tests used in standards for evaluating smoke alarms were developed back in the 1980s. However, despite changes in building materials since then, smoke alarms remain reliable, says Chagger: "They still respond to all the main fires we get today."，详情可参考91视频
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quite a legacy: now you know the reason that so many later ATMs ran OS/2. IBM,