采砂
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sand and gravel extraction 砂石精选
sand gravel extraction
砂砾提取
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Besides the storm tide impact, the main causes for coastal erosion are due to the continued decrease of material supply and manual extraction of sand and gravel.
海岸侵蚀的原因除风暴潮影响外，主要是海岸带物质补给来源持续减少和人工采挖砂石。
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Major activities in the area are agriculture, forest management, sand and gravel extraction, industry (diverse types), and ecotourism.
UNESCO: EDUCATION
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