官网解释地址：https://discussions.apple.com/thread/6851689?sortBy=best
In iCloud（在云上）: The In iCloud status icon 
tells you that the folder or file is only in iCloud. （文件在云上呢，不在本地，你要点击下载才能看）You must be connected to the Internet to work with the item, unless you download it to your Mac. Control-click the file, then choose Download Now.
Ineligible: (云上没空间了，这个文件你不能上传到云了)The Ineligible status icon 
tells you that the folder or file could not be stored in iCloud. This is usually because you don’t have enough iCloud storage. To learn more about freeing up storage, see Optimize storage on your Mac.
Downloaded: The Downloaded status icon 
（该文件夹或文件在 Mac 和 iCloud 之间是最新的，无论是否有互联网连接，您都可以立即查看或编辑它。）tells you that the folder or file is up to date between your Mac and iCloud and you can view or edit it immediately, with or without an Internet connection.
Waiting to Upload: The Waiting to Upload status icon 
（本地的文件，等待联网后上传到云）indicates that the folder or file is not yet stored in iCloud.
Out of Space: The Out of Space status icon 
（iCloud 存储空间已满。）indicates that the folder or file can’t be stored in iCloud because there isn’t enough iCloud storage.A similar icon can also appear next to iCloud Drive in the sidebar, where it indicates that iCloud storage is full.
Pie chart: The pie chart status icon 
（正在上传，文件传输到 iCloud Drive 和从 iCloud Drive 传输的总体进度。）gradually increases from clear to dark as the files are transferred.The same pie chart can also appear next to iCloud Drive in the sidebar, where it indicates the overall progress for files transferring to and from iCloud Drive.
最后，完成同步的图标如下：
