He was sitting and hugging his knees, talking with his friends.

He is studying the function of the dilator naris.

The external anal sphincter plays a crucial role in helping us control defecation.

I use hair tonic every night.

I bought a drink from the vending machine.

We learned about the importance of sex education at school.

This product is a parallel import.

My child is currently learning educational kanji.

It's difficult to get a strike in bowling.

I learned how to calculate the harmonic mean in math class.