示波图

例句：

1. 1. The engineer used a graph to illustrate the data.
   工程师用图表来说明数据。
2. 2. The scientist drew a graph to show the relationship between variables.
   科学家画了一个图表来显示变量之间的关系。
3. 3. The teacher used a graph to help students understand the concept.
   老师用一个图表帮助学生理解这个概念。