当用户单击此图标时，一个请求将在后台发往服务器，其中带有用户希望订阅的对话框的相关信息。

When the user clicks that icon, a request goes in the background to the server with information about which box the user wants to subscribe to.

youdao

当用户单击此图标时，一个请求将在后台发往服务器，其中带有用户希望订阅的对话框的相关信息。

When the user clicks that icon, a request goes in the background to the server with information about which box the user wants to subscribe to.

youdao