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| 脱机文件夹文件 (The file on your hard disk that contains offline folders. The offline folder file has an .ost extension. You can create it automatically when you set up Outlook, or when you first make a folder available offline) | |||
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| 脱机文件夹文件 (The file on your hard disk that contains offline folders. The offline folder file has an .ost extension. You can create it automatically when you set up Outlook, or when you first make a folder available offline) | |||
