model of qualitative choice

例句：

1. 1.The scientist used a model to predict the outcome of the experiment.
   科学家使用一个模型来预测实验的结果。
2. 2. The new software model is designed to simplify complex processes.
   新的软件模型被设计用来简化复杂的过程。
3. 3. The model was based on a mathematical formula that had been proven correct in previous experiments.
   这个模型基于一个在之前的实验中已经被证明正确的数学公式。