hydroelectric相关的词根或词缀是: hydrhydro

Hydroelectric power provides almost one-fifth of the world 's electricity .

水电提供了世界差不多1/5的用电量。

Currently several upstream nations including ethiopia and uganda are planning hydroelectric dams .

现在，一些上游国家，包括埃塞俄比亚和乌干达都在计划兴建水电坝。

Officials have argued that the environmental benefits of hydroelectric power outweigh its costs .

政府官员曾指出，水力发电给环境带来的好处大于成本。

Changing rainfall in the rwenzori hills has resulted in less water to power three hydroelectric plants .

鲁文佐里山中的降雨量不断变化，导致三家水利发电站用水不足。

Once built , nuclear plants produce some of the cheapest electricity available other than big hydroelectric dams .

一旦建成，这些核电厂的发电成本将比大型水电站低得多。