吃透英语课本，提升在校竞争力
n. 碎石；瓦砾
Brick rubble is useful as the base for paths and patios.
碎砖可用作道路和天井的基石。
The earthquake left the city in rubble.
地震使城市变成了一片废墟。
rubble mound
毛石堆；毛石基；堆石斜坡堤
n.碎石，碎砖；[建]粗石堆
crushed stone
rockfill
