choked layer of sand

例句：

1. 1. The river had beenchoked with silt for years,making it difficult to navigate.
   这条河多年来被淤泥堵塞，使得航行变得困难。
2. 2. Theengineer carefully removed the choked layerof sand to clear the path.
   工程师小心翼翼地移除了堵塞的沙层，以便清理道路。
3. 3. The construction crew had to work aroundthe choked layer of sand tocomplete the project.
   施工队不得不绕过堵塞的沙层来完成这个项目。