saturation index

例句：

1. 1. The graph shows the relationship between temperature and humidity, which is a measure of the saturation index.
   图表显示了温度和湿度之间的关系，这是饱和指数的衡量标准。
2. 2.The research found that the saturation index was higher in areas with more rainfall.
   研究发现，降雨量较多的地区的饱和指数较高。
3. 3.The saturation index is used to determine when soil becomes too wet or too dry for plant growth.
   饱和指数用于确定土壤是否太湿或太干，不适合植物生长。