In October, the United Nations Environment Program declared the Yangtze and Pearl River estuaries dead zones.

去年十月，联合国环境署宣布扬子江及珠江入海口为死水区。

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Zinc Anodes suffer a similar problem even in brackish conditions whereas Aluminum will continue to operate effectively in river estuaries and other areas of brackish water indefinitely.

锌阳极即使在微咸环境中也会产生类似的问题，但是铝在河口和其它不明确的微咸水环境中也会继续有效运转。

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In October, the United Nations Environment Program declared the Yangtze and Pearl River estuaries dead zones. The water doesn't have enough oxygen in it to support fish.

去年十月，联合国环境署宣布扬子江及珠江入海口为死水区。这两处地区水的含氧量不足以维持鱼类的生存。

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"Also the saltwater tide will invade river estuaries and coastal areas.

VOA: standard.2010.03.29

The Mount Kuwol Biosphere Reserve, situated on the west coast of the Democratic People s Republic of Korea and 100 kilometres south-east of Pyongyang, consists of a 954 meter-high mountain, adjacent coastal wetlands, lagoons and river estuaries, and agricultural areas.

UNESCO: Natural Sciences

There are dams all around the country, guarding all main river estuaries and sea inlets.

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However, things are a little more complicated when it comes to coastlines in the vicinity of inlets, such as river mouths, lagoons and estuaries.

UNESCO: Social and Human Sciences