pile cotton blanket

例句：

1. 1. The children were happily playing in the sand pile.
   孩子们在沙堆里高兴地玩耍。
2. 2. The boxes are piled high on the shelf.
   箱子被堆放在架子上很高。
3. 3. The snow was piling up against the fence.
   雪正堆积在篱笆上。