diagram of component forces

例句：

1. 1.The engineer drew a diagram of the new bridge.
   工程师绘制了新桥的示意图。
2. 2.The scientist used a diagram to explain the process.
   科学家用图表来解释这个过程。
3. 3. The teacher drew a diagram on the blackboard to help us understand the lesson.
   老师在黑板上画了一个图，帮助我们理解这节课的内容。