in AM, use 美国英语用 diagraming, diagramed
1. 图表;简图;示意图
A diagram is a simple drawing which consists mainly of lines and is used, for example, to explain how a machine works.
e.g. ...a circuit diagram...
电路图
e.g. You can reduce long explanations to simple charts or diagrams.
你可以把冗长的解释简化成一目了然的图表。
2. 绘制…的示意图;用图表表示（或说明）
To diagram something means to draw a diagram of it or to explain it using a diagram.
e.g. The sound waves of the voice could be diagramed as in B.
这个声音的声波如图B所示。
e.g. ...diagramming the movement of a system's variables.
用图表表示系统各个变量的变化情况
