noun · a small beanbag or footbag used for tossing or kicking games

下课了，同学们在操场上玩丢沙包。

noun · a bag filled with sand used for physical training, construction, or as a weight

课间休息时，几个孩子在操场上开心地玩丢沙包。

noun · a hill or mound of sand formed by wind action

骆驼队缓慢地翻过了一个巨大的沙包。