We need to consider both the upstream and downstream view.

我们需要同时考虑上行和下行视图。

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Downstream of the upstream water too much, cause water shortage, block;

上游未经处理排出的废污水，造成下游河道污染；

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Downstream of the upstream water too much, cause water shortage, block;

上游未经处理排出的废污水，造成下游河道污染；

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