I deeply appreciate your help.

I commute to school by bicycle every day.

He is the main organizer of this event.

This area is off-limits due to high radiation levels.

We have achieved an important milestone in this project.

Who is the author of this book?

On cold days, a heater is necessary.

Hydrocarbons are fundamental components of organic chemistry.

The wheel of my bicycle has gone flat.

Lithium hydride plays an important role in chemical reactions.