在潮差大的海湾入口或河口筑堤构成水库，在坝内或坝侧安装水轮发电机组，利用堤坝两侧潮汐涨落的水位差驱动水轮发电机组发电。
目前也有一场竞赛，要从潮汐能发电，如此我们才能停止开采煤炭。
And there is a race on at the moment to convert electricity from tidal and wave power, in order that we can leave the coal in the ground.
潮汐能作为一种可再生资源，蕴藏量大，利用潮汐能发电，运行成本低。
The running cost of generating power from tidal energy is very low.
现在有一种新设备可以利用潮汐能发电，而且可以在成本上与化石燃料发电一较高下。
A new device for harnessing wave energy is promising renewable electricity at a cost to rival fossil fuel sources.
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