Louisiana officials want to start building sand berms as barrier islands, to block oil from entering the fragile marsh ecosystems;
路易斯安那州官员希望开始建造作为屏障的沙堤来阻止石油侵入脆弱的沼泽生态系统;
In high slope the pipeline is anchored with sand or soil bags and the upper and lower part of the block is compact solidly.
在大斜坡区段,管线用沙袋或土袋锚固,固定块的上部和下部应压实牢固。
Place the house sponge on the cinder block and place the brick with the carpenter's sponge sand paper and duct tape on top of the sponge.
将家用海绵放在空心渣煤砖上(作桌子用),上面依次放置砖头、木匠用海绵、砂纸和胶带在海绵之上。
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