precipitation method

例句：

1. 1. The weather forecast predicts heavy rainfall tomorrow.
   天气预报预测明天会有大雨。
2. 2.The city relies heavily on its annual precipitation for water supply.
   这个城市严重依赖其年度降水量来供水。
3. 3. The scientist conducted experiments to study the effects of different precipitation patterns on crops.
   科学家进行了实验，研究不同的降水模式对农作物的影响。