free particle model

例句：

1. 1. The free particle modelis widely used in the study of chemicalreactions.
   自由粒子模型在化学反应研究中被广泛使用。
2. 2. In the free particle model,atoms are considered to be free particles thatcan move around and interact with each other.
   在自由粒子模型中，原子被视为可以自由移动和相互交互的粒子。
3. 3. The freeparticle model has been provento be a useful tool forpredicting the behavior of materials undervarious conditions.
   自由粒子模型已被证明是一种预测材料在不同条件下行为的有效工具。