他在黑板上画图表，有时我们中有人会再问问题，让他继续讲下去。

He drew diagrams on the board and sometimes one of us asked another question to keep him talking.

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要添加动画图表，按以下几点操作。

To add animation to a chart, do the following.

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画图表展示有趣的事实并做比较。

Draw graphs and charts to show interesting facts and to make comparisons.

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Here is the cell body up at the top of the diagram here.

图表上部画的是细胞体

耶鲁公开课 - 生物医学工程探索课程节选