The balance of intestinal bacteria greatly affects health.

He understands the importance of learning.

He is majoring in psychology.

Gaku is my best friend.

He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

She used to be a prostitute, but now she has started a new life.

Will you marry me?

"Do you want to have a meal? Take a bath? Or choose me?" she said jokingly.

He was hiding the fact that he was an illegitimate child.

I'm sorry, but I don't speak Japanese.