He is a world-famous mathematician.

He was my travel companion.

In my town, pedicabs are the main mode of transportation.

He was an eyewitness to the incident.

It is said that smokers have a higher health risk compared to non-smokers.

In urban areas, smog has become a serious problem.

I bought fresh fruits at the souq.

If you use this spray, your hair will become silky smooth.

He sprayed his hair.

Nitrous oxide, also known as laughing gas, is used for anesthesia.