The ejecta from the volcano plays an important role in shaping the terrain.

He refused to clean up the vomit.

This mineral is very rare.

My favorite bowl dish is Oyakodon.

Recently, I've been troubled by a severe feeling of residual urine.

My grandmother always carries an incontinence pad with her.

The urachus is a structure that exists during the fetal period, connecting the bladder and the navel.

His daughter was diagnosed with phenylketonuria.

His art style is unique, it's neither fish nor fowl.

In chemistry class, I learned about the reactions of acid anhydrides.