通过采捞我们可以获得很多稀有的水生生物进行科学研究。

By dredging we can get a lot of rare aquatic organisms for scientific research.

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局部问题包括从由海岸径流引起的污染及淤积到因对天然食品的强烈需求而引发对海草采捞的增大。

Local issues range frompollution and siltation due to coastal runoff to an increase in the harvest ofsome seaweeds, fueled by the demand for natural food.

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