Removing the mud, uncovering gravel beds where fish spawn, and finding suitable salmon types to rebuild the population is a daunting task.

清除淤泥，发现鱼类产卵的砾石层，找到合适的鲑鱼种类来重建种群是一项艰巨的任务。

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Now there is no mud, and no food for the fish — they've left us.

现在泥沙没有了，鱼没有可吃的了，也就不来了。

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“There is no point in a loach trying to mimic a goldfish, ” he said, comparing himself to the whiskered, mud-dwelling fish.

“一个泥鳅尝试去模仿金鱼是毫无意义的，”他说，将自己比作须状地泥生的泥鳅。

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And he made people laugh, comparing his puffy appearance to that of a loach, a fish that loves mud.

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The changes, the company has said, mean its plans are more fish-friendly and will reduce the amount of inter-tidal mud flats that will be lost to feeding birds.

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The changes, the company says, mean its plans are more fish-friendly and will also reduce the amount of inter-tidal mud flats that will be lost to feeding birds, while still generating 5% of the UK's energy needs or enough to power 3.4 million homes.

BBC: Severn Barrage artist's impression