If the user chooses to cancel the operation, then the file is not opened.
如果用户取消操作，则不打开文件。
The stay time had better not over 1 minute, if necessary could repeat the operation, and then clean and dry it.
使用柠檬汁也应十分注意，其停留时间最好不要超过1分钟，必要时可重复操作，然后清洗并擦干。
The stay time had better not over 1 minute, if necessary could repeat the operation, and then clean and dry it.
使用柠檬汁也应十分注意，其停留时间最好不要超过1分钟，必要时可重复操作，然后清洗并擦干。
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