in the direction a river or stream is flowing顺流(地),向下游(地)
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后阶段(地)
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。