Then, you learned how to add a subscription feature so we can notify our users by email when new documents are added to the document category to which they are subscribed.

然后，学习了如何添加订阅特性，这样当用户订阅的文档类别中添加了新文档时，我们就可以通过电子邮件通知他们。

youdao

Then, you learned how to add a subscription feature so we can notify our users by email when new documents are added to the document category to which they are subscribed.

然后，学习了如何添加订阅特性，这样当用户订阅的文档类别中添加了新文档时，我们就可以通过电子邮件通知他们。

youdao