pile band

例句：

1. 1. The pile of books on the table is too heavy to carry.
   桌子上的一堆书太重了，搬不动。
2. 2. The pile band of rocks in the riverbed is causing problems for the fish.
   河床上的岩石堆叠带给鱼儿带来了问题。
3. 3. The pile band of leaves on the ground is a sign of autumn.
   地上的落叶堆叠带是秋天的标志。