differential expansion indicator

例句：

1. 1. The differential expansion indicator is used tomeasure the rate of change in a variableover time.
   差异扩张指标用于测量变量随时间的变化率。
2. 2. The company'sfinancial performance has been monitored using this indicator.
   公司财务表现已通过这一指标进行监控。
3. 3. The research team developed a new modelbased on this indicator to predict market trends.
   研究团队基于这一指标开发了一个新的模型，以预测市场趋势。