也就是说，假设你有两个用户同时创建一个电子邮件(只在我这里工作)，具有相同的主题行，正文和发送地址。
That is, assume you have two users creating an email simultaneously (just work with me here) having the same subject line, body, and send address.
也就是说，假设你有两个用户同时创建一个电子邮件(只在我这里工作)，具有相同的主题行，正文和发送地址。
That is, assume you have two users creating an email simultaneously (just work with me here) having the same subject line, body, and send address.
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