它将获得当前用户(订阅者)和正在添加的订阅的电子邮件地址。
It gets the current user (the subscriber) and the E-mail address of the subscription being added.
也有人指出，如果你尝试使用旧的电子邮件地址重新注册，Facebook将简短地告知该地址当前正在使用。
Others have noted that if you try to re-register using your old E-mail address, Facebook will curtly inform you that the address is currently in use.
您最好确定您的电子邮件地址为当前使用的。
You should especially ensure that your email address is kept current.
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