这样做的目的就是让您能够看到所有正发出的通知。
The purpose for this is to allow you to see all the notifications which are being emitted.
控制台上显示的每一条消息实际上都是从命令发出的通知。
Each message which is displayed on the console is actually a notification emitted from the command.
然而，考虑到本示例的目的，说明一下所有发出的通知是非常有用的。
However, for the purpose of our example it is useful to illustrate all the notifications emitted.
应用推荐