whereupon

1. The landlady was sent out for a two-hour walk with the dog, no matter what the weather; whereupon the niece and the respectable looking middle-aged man promptly went upstairs. He was as regular as clockwork.
   无论天气如何，房东太太要带狗出去散步两个小时，这时那侄女便和一个看上去很体面的中年男人上了楼。那人每天也真够准时的。
2. One of the man insulted another, whereupon a fight broke out.
   其中一个男人侮辱了另一个男人，于是他们就打了起来。

where.up.on

conj.（连接词）
On which.
在…之上，关于…
In close consequence of which:
随之，据此：与…有密切因果联系：
例句：
The instructor entered the room, whereupon we got to our feet.
教员走进了房间，随之我们全站了起来