in the direction a river or stream is flowing

The current carried her downstream. 水流将她冲向下游。

used to describe something that happens later in a process or series of events

He has expanded the glass manufacturing firm by purchasing downstream businesses such as a glass distribution company. 他扩大了玻璃制造厂业务，途径是购买相关后阶段工序的企业，如一家玻璃制品经销公司。