model modifying mode

例句：

1. 1. The engineer designed a new model of the car.
   工程师设计了一款新型汽车。
2. 2. He is a good model for his students to follow.
   他是一个很好的榜样，供学生效仿。
3. 3. The model was used to test the new software.
   这个模型被用来测试新的软件。