Since then, some 430 outdated dams have been removed from U.S. rivers, opening up habitat for fish and other aquatic organisms and letting rivers flow like rivers again.

从那时起，约430座过时的水坝在美国河流上消失，此举打通了鱼群和其他水生物的返回栖息地的通道，并重新让河流川流不息起来。

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Since then, some 430 outdated DAMS have been removed from U. S. rivers, opening up habitat for fish and other aquatic organisms and letting rivers flow like rivers again.

从那时起，约430座过时的水坝在美国河流上消失，此举打通了鱼群和其他水生物的返回栖息地的通道，并重新让河流川流不息起来。

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By October, it had zoomed past Cleveland more than 100 miles to the east and penetrated the lake's central basin, where decomposed algae had already created an oxygen-deprived "dead zone" lethal to most fish and other aquatic organisms.

WSJ: Report predicts ever-bigger Lake Erie algae blooms