A controversial see-through glass pyramid-shaped structure was added by the architect I. M. Pei in the 1980s.

1980年代，建筑家贝聿铭增建一座倍受争议的透明玻璃金字塔型建筑。

As a centerpiece, Jobs commissioned I. M. Pei to design a grand staircase that seemed to float in the air.

在大堂的中心，乔布斯委托贝聿铭设计了一段宏伟的楼梯，看上去就像飘浮在空中一样。