他们说，至少几十年维持三文鱼数量的唯一可选择的办法是在一年里最热的时间减少为了水力发电而修建的分水渠。

The only option that preserved salmon populations, at least for a few decades, was to reduce the diversions for hydropower generation at the warmest time of the year, they said.

youdao

他们说，至少几十年维持三文鱼数量的唯一可选择的办法是在一年里最热的时间减少为了水力发电而修建的分水渠。

The only option that preserved salmon populations, at least for a few decades, was to reduce the diversions for hydropower generation at the warmest time of the year, they said.

youdao