Oleum is a very dangerous chemical, and it requires great caution when handling.

Care is needed in handling this product.

We will use sulfuric acid in this experiment.

The fire alarm detected smoke emission.

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

This road is dangerous, so please be careful.

Please avoid this road because it's dangerous.

I was amazed at his extraordinary talent.

Please press this button in case of emergency.

It is a very beautiful view.