“sand bag”造句，怎麼用sand bag造句

When using padding, anchor the pillow down with a sand bag or a non-reflecting heavy object so it doesn't move.

This paper has a detailed description on construction and final results of sand bag cofferdam.

Yes. There will be specific materials that fly up for sand, sand bags, grass, rock, metal, water etc etc. when shot, mortar'd, or grenaded.