volume graph

例句：

1. 2.
   用于表示某物体的
2. 1. The engineer drew a volume graph to show the distribution of the materials.
   工程师绘制了一个体积图来展示材料的分布情况。
3. 2. The data in the volume graph indicates that the population is increasing.
   体积图中的数据表明人口正在增加。
4. 3. The volume graph shows that the company's sales have been declining over the past year.
   体积图显示，过去一年该公司的销售额一直在下降。