The former method USES a single file to hold all of the E-mail, occasionally changing this to a system where a single file holds the mail for each folder.
前一种方法使用单个文件来保存所有的电子邮件，有时可能将其更改为一个系统，其中使用单个文件来保存每个文件夹的邮件。
The former method USES a single file to hold all of the E-mail, occasionally changing this to a system where a single file holds the mail for each folder.
前一种方法使用单个文件来保存所有的电子邮件，有时可能将其更改为一个系统，其中使用单个文件来保存每个文件夹的邮件。
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