unstable system

例句：

1. 1. The construction site is unstable due to the heavy rain.
   由于大雨，施工现场变得不稳定。
2. 2. The economy is unstable, and it's hard to predict what will happen next.
   经济不稳定，很难预测接下来会发生什么。
3. 3. The company's financial situation is unstable, which poses a threat to its long-term growth.
   公司的财务状况不稳定，这对其长期增长构成了威胁。