then翻译成"然后"的时候,为什么不加逗号?

Question

First, they will visit Music Room.
Next, they will look at our project.
Then they will visit the meeting room.
Finally, they will visit language lab.

另外三个副词后面都要加逗号,只有then后面不加,想不通啊~~~
但牛津英语课本里特别强调then后面不加逗号啊，就觉得奇怪了。。。Who can tell me? 3Q~~~

Answer 1

加不加都可以的啊

Answer 2

英语里的常识!我们也没办法本回答被提问者采纳