model projects

例句：

1. 1. The architect designed a model of the new building.
   建筑师设计了新建筑的模型。
2. 2. The teacher gave us a model of the solar system.
   老师给我们展示了太阳系的模型。
3. 3. The scientist used a model to explain the process.
   科学家用一个模型来解释这个过程。