curve-line graph

例句：

1. 1. The sales data is displayed on a curve-line graph to show the trend over time.
   销售数据以曲线图的形式显示，以展示随时间的趋势。
2. 2.The engineer used a smooth line graph to illustrate the relationship between temperature and humidity.
   工程师使用一条平滑的折线图来说明温度与湿度之间的关系。
3. 3. The scientist produced an exponential graph to analyze the growth rate of the population.
   科学家制作了一条指数曲线图来分析人口的增长速率。