train graph

例句：

1. 1. The engineer used a train graph to analyze the data.
   工程师使用一个训练图来分析数据。
2. 2.The company's performance was closely monitored using a train graph.
   公司的业绩被密切监控，使用了训练图。
3. 3. The scientist plotted a train graph to illustrate the relationship between variables.
   科学家绘制了一个训练图来说明变量之间的关系。