增加水分

例句：

1. 1. The population of the city has been increasing steadily over the past decade.
   过去十年里，这个城市的人口稳步增长。
2. 2. The company's profits have been increasing year by year.
   公司的利润每年都在增长。
3. 3. The amount of water in the reservoir has been increasing due to increased usage.
   由于使用量的增加，水库中的水量正在增加。