Rain refreshes air.
Meaning: This means that rain can make the air feel and smell cleaner and fresher. It's a way to describe how rain can have a positive effect on the quality of the air we breathe.
Choice of Words: Rain is water that falls from the sky in drops. Refreshes means to make something feel or seem fresh and new again. In this context, it suggests that the rain can make the air feel clean and fresh. Air is the mixture of gases that surrounds the earth.
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