This compound contains a sulfhydryl group.

Kazumi is my best friend.

I have been to Suishiei.

I buy water at the water store every day.

Groundwater pollution has become a serious environmental problem.

I saw various aquatic creatures at the aquarium.

He cautioned not to speak ill of others, saying, 'Illness enters by the mouth, and disaster does not come out of it.'

I consume royal jelly every day.

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.