numerical instability

例句：

1. 1. The numericalinstability of the system makes it difficult to predict its behavior.
   系统的数值不稳定使得预测其行为变得困难。
2. 2.Numerical instability is a common problem in fluid dynamics simulations.
   数值不稳定是流体动力学模拟中常见的问题。
3. 3. The numerical instability of the model was a major concern for the researchers.
   模型的数值不稳定是研究人员的主要担忧。