cupola stack

例句：

1. 1. The engineerswere busy stacking the boxes in preparationfor the move.
   工程师们忙着把箱子堆叠起来准备搬家。
2. 2. The constructionworkers were layering thebricks to build a newwall.
   建筑工人在砌砖以建造新墙。
3. 3. The scientists were carefully stackingthe samples in their lab.
   科学家们小心翼翼地将样本堆放在他们实验室里。