Many ancient civilisations piled up mountains of garbage .

许多古代文明都堆积了成山的垃圾堆。

Their bedside table is piled high with devices and chargers .

他们的床头柜上高高地堆着各种设备和充电器。

When the pressure drops , the pipes suck in the matter piled on top .

气压下降后，水管就会把堆在上边的东西吸进去。

So options have been closed down and eggs have been piled into single baskets .

所以选择没有了，鸡蛋都堆到一个篮子里了。

Is every space piled high with dust or dirt ?

每个地方都堆积着厚厚的灰尘或污垢吗？