In many user applications, it is useful to save the application status.
在很多用户应用程序中，保存应用程序状态很有用。
An E-mail service that e-mails the user about the status of his credit card.
电子邮件服务，向用户发送有关信用卡状态的电子邮件。
An E-mail service that e-mails the user about the status of his credit card.
电子邮件服务，向用户发送有关信用卡状态的电子邮件。
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