power that comes from the movement of the tide (= the rise and fall of the sea that happens twice every day) and that can be used especially for producing electricity

Traditional tidal power schemes have involved putting a barrage across an estuary, using turbines to generate power as water ebbs and flows. 传统的潮汐发电是在河口设置拦河坝，使用涡轮机在水流起伏时发电。

The Government pledged investment into the research and development of wind, solar, and tidal power. 政府承诺对风能、太阳能和潮汐能的研究和开发进行投资。