He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

Understanding the structure of atoms is a fundamental part of physics.

Tonight's final performer is an internationally famous singer.

Please read the instruction manual for this new smartphone.

Where can I see the setlist for tonight's concert?

The government is considering the introduction of a carbon tax.

Tetradecane plays an important role in organic chemistry.

Hexadecane is one of the important hydrocarbons in organic chemistry.