conj.因此；于是；在…上面
He didn't understand the point, whereupon I had to explain further. 他不理解这一点,因此我只得作了进一步的解释。
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。
He saw me coming, whereupon he ran off in the other direction. 他看见我来了，于是就向另一个方向逃跑了。
