Though their function is to cover the holes in streets through which sewers, drains and other structures are reached; manhole covers have long been admired for their beauty.

• 虽然它们的功能只是遮盖街道上的下水道、水沟或者其他地面设施的检修孔，但井盖的精美设计长期以来就一直受人们赞赏。