User A sees a dialogue box that tells the user the document is locked. The dialogue box offers to open the document in read-only mode, or to open a copy for editing, or to cancel the Open command.
用户 A 会看到一个对话框告知用户文档已被锁定。该对话框提供以只读模式打开文档，或打开文档的副本以编辑，或取消“打开”命令。