collapse after exercise

例句：

1. 1. The building collapsed due to a faulty foundation.
   由于地基不稳，大楼倒塌了。
2. 2. The economy is collapsing due to the pandemic.
   由于大流行，经济正在崩溃。
3. 3. The team's morale collapsed after their defeat.
   球队在败北后士气低落。