We exist as a part of the material world.

This food may contain carcinogens.

I found an old box in the storeroom.

Neurotransmitters are responsible for transmitting information between nerve cells.

Chemotransmitters play an important role in the transmission of information between nerve cells.

Sufficient caution is necessary when handling radioactive materials.

She felt the pathos of things when she saw the cherry blossoms falling.

What is this object?

Zoo staff must clean up the animals' excrement every day.

I am thinking about what to make her birthday gift.