His efforts were a drop in the bucket.

This jacket has high water repellency.

I often drink carbonated water.

He built up a lead so big from the start of the game that he left his opponent in the dust.

This salt contains water of crystallization.

I use distilled water for the experiment.

I live in Yakusui, Oyodo.

He is an expert in hydrology and is conducting research on flood prevention.

He is an expert in hydrology, and his research is highly valued around the world.

His sister suffered for a long time because of noma.