Please press this button in case of emergency.

He used a computer to process the data.

The signal turned red, so I stopped.

He received the letter challenging him to a duel and began preparing for the duel.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

For some reason, I can't convert this sentence.

Affine transformation is an important concept in geometry.

It is important to understand the importance of health.

Please use the emergency stairs in case of a fire.