1971年，雷发明了第一个电子邮件系统，人们可以用同一台电脑发送电子邮件。
In 1971, Ray created the first email system, which allowed people to send messages electronically from the same computer.
例如，在一个项目订单从前端应用发送给订单系统的时候，一封要求确认的电子邮件也可能同时被发送给客户。
For example, when an item order is sent from a front application to the ordering system, an email can also be sent to the customer for confirmation.
电子信箱是根据邮政邮件系统而设计的，一个邮件在发送者和接受者之间进行来回的传递。
Electronic mail is based on the paradigm of postal mail, a system of passing messages back and forth between senders and recipients.
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