He discussed the dangers of the hydrogen bomb.

I bought a new bathing suit.

My hobby is keeping saltwater fish.

He bought new swimming trunks.

He is majoring in hydrology at university.

He is the type of person who can distinguish between good and bad.

We went to the swimming beach with our family during the summer vacation.

He believes in zoolatry and lives a life in harmony with nature.

He is good at playing the trumpet.

He was recognized as the best commander in that battle.