He has cyclothymia, and his mood changes drastically.

This wall is made of chalky material.

The one-eyed goblin was dancing in the forest.

This old radio uses a cold-cathode tube.

Please store the food in the refrigerator.

The grey matter of the brain is the central part of information processing.

He has psychopathy, making it difficult for him to understand social rules.

Amorphous substances have characteristics different from crystals.

The cytosol is the liquid part inside the cell, and many enzymatic reactions occur here.

Alternating hot-cold baths have the effect of improving blood circulation in the body.