diagram category

例句：

1. 1. The engineer drew a diagram of the new machine's components.
   工程师绘制了新机器组件的图解。
2. 2.The scientist used a diagram to explain the chemical reaction.
   科学家用图解来解释化学反应。
3. 3.The teacher provided a diagram for the students to follow along with.
   老师为学生提供了一张图，以便他们跟着做。