vapor pressure index

例句：

1. 1.The vapor pressure index is used to measure the amount of water vapor in the air.
   蒸汽压指数是用来测量空气中水蒸气含量的。
2. 2.The vapor pressure index can affect the weather forecasts.
   蒸汽压指数可以影响天气预报。
3. 3. The vapor pressure index is a key factor in determining the optimal temperature for growing crops.
   蒸汽压指数是决定农作物最佳生长温度的关键因素。