设计象征着世贸大楼倒塌的空白瞬间---当工程完成时，水就会引入。

Waterfalls will course down the side walls and then into the square in the middle — a symbol of the void created when the towers fell — when the project is complete.

youdao

在塔楼倒塌时，在大楼和街上的其它遇难者被埋在如此之多的残骸之下，好几个月都不会找出他们的尸体。

Others, in the buildings or on the streets as the towers collapsed are under so much debris that their bodies may not be found for months.

youdao

但当其中一个塔开始倒塌时，他们被迫冲进世贸中心建筑群的五号大楼内避难。

But when one tower began to collapse, they raced for cover inside Building Five of the Trade Center complex.

youdao