sandbag

sandbag
n bag filled with sand, used as a defence (eg in war, against rising flood-water, etc) 沙袋, 沙包（如用於作战、 防洪等）. v (-gg-) [Tn]
put sandbags in or around (sth) 在（某物）内或四周堆上沙袋
    sandbag the doorway in case of flooding 在门口堆上沙袋以防洪水.

牛津英汉双解词典