free-body diagram

例句：

1. 1. In thiscase, the free-body diagram is crucial for understanding the forces acting on the object.
   在这种情况下，自由体图对于理解作用于物体的力至关重要。
2. 2. The engineer used a free-body diagram to analyze the forces acting on the structure.
   工程师使用自由体图来分析作用于结构上的力。
3. 3.The free-body diagram helped the team to quickly identify and correct any errors in the design.
   自由体图帮助团队迅速识别并纠正设计中的任何错误。