upstreaminjection

例句：

1. 1. The river upstream injection has been a major concern for environmentalists.
   河流上游注入一直是环保人士的重大问题。
2. 2. The company's decision to upstream injection was met with mixed reactions from the public.
   该公司决定进行上游注水的决定引起了公众的混合反应。
3. 3. The upstream injection of water into the reservoir has significantly reduced the water level.
   将水注入水库上游已经显著降低了水位。