塞文河口是鸟类的栖息地，而大型水坝会在很大程度上破坏或毁坏河口，这同样也会破坏河流中鱼群的生态环境。
The Severn estuary is an important habitat for birds; large barrages would destroy or damage much of it, as well as interfere with fish stocks in the river.
可以举出很多很多的例子说明自然生态环境已经被迅速地改变了，亚马逊河流域就是最好的例证。
A number of examples can be given of the way in which natural environments are being rapidly changed - Amazonia, for instance.
这对探求渭河流域生态环境的综合治理，合理利用水资源有着非常重要的意义。
It was very important significance for comprehensive improvement ecosystem environment in Weihe Basin and rational utilization of water resources.
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