heap Pelion upon Ossa

例句：

1. 1. The workers heaped the sand onto the foundation.
   工人们把沙子堆在地基上。
2. 2. He heaped his books on the desk.
   他把书堆在桌子上。
3. 3. The children heaped their toys in a pile.
   孩子们把他们的玩具堆成一堆。