Engler curve

例句：

1. 1. The Engel curve shows that as incomes rise, the proportion of income spent on food decreases.
   恩格尔曲线显示，随着收入的增加，用于食物的支出比例下降。
2. 2. This study used data from the Engel curve to analyze consumer behavior.
   这项研究使用了恩格尔曲线数据来分析消费者行为。
3. 3. The Engel curve is often used to predict how people will spend their money in the future.
   恩格尔曲线经常被用来预测人们未来会如何花钱。