我们已经看到，在我们的桥梁轰塌，大坝倾倒时我们所承担的悲剧性后果。
We've seen the tragic consequences when our Bridges crumble and our levees fail.
跑在她前面的七个女工随着楼梯的轰塌消失了，接着楼顶塌下，把她和工友们困在了瓦砾之下。
Seven women fleeing ahead of her disappeared as the staircase collapsed. Then the roof fell in, pinning her and her colleague under rubble.
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