1. Down in the Columbia River valley, the waters piled up gravel and other debris into tidges as big as battleships. 
   下面的哥伦比亚河谷中，洪水将砂砾和其他碎屑堆积成战舰大小的山脊。
2. (3) Mining sand and gravel or placer gold in river channel or navigation channel without approval or not in accordance with the approved scope and operation procedures. 
   　　(三)未经批准或者不按照批准的范围和作业方式，在河道、航道内开采砂石、砂金的；
3. The gravel ingredient of concrete. 
   石碴组成混凝土的砂料
4. made of packed earth or gravel. 
   填满了泥土或砂砾的。
5. Within a channel for flood passage, excess water drainage or navigation, all mining activities for sand and gravel or placer gold must be reported to the river administrative department for approval, and the mining activities must be in accordance with the approved scope and operation procedures; 
   　　在行洪、排涝河道和航道范围内开采砂石、砂金，必须报经河道主管部门批准，按照批准的范围和作业方式开采；

查看更多例句 相关情景会话

• 1. 河砾石
  river erosion 河林蚀...river gravel 河砾石...river mouth 河口
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• 2. 河砾
  river erosion 河蚀...river gravel 河砾...river marsh soil 河滨沼泽土
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