depression of the dew point

例句：

1. 1.The weather forecast predicted a decrease in the dew point temperature.
   天气预报预测露点温度会下降。
2. 2.During the drought, the dew point temperature dropped significantly.
   在干旱期间，露点温度显著下降。
3. 3. The scientists observed that the dew point temperature was lower than usual due to the cooler air.
   科学家们观察到由于较冷的空气，露点温度比平时低。