The mast bell has been removed. The National Oceanic and Atmospheric Administration estimates that the remaining structure is likely to collapse within the next 50 years.
美国国家海洋和大气管理局估计,剩下的结构很可能在未来50年中分崩拆离。
2
And then all of a sudden that structure is untenable, and the weight starts bearing down on floors that were not designed to hold that weight, and you start having collapse.
而下面的钢筋本来不是被设计来承担那么多重量的,于是就开始坍塌了。
3
Once you've cleared fallen debris - or if a structure is liable to collapse further - you should shore it up with timbers.