He was laughing happily.

He looked out the window.

I sincerely apologize.

Chromium has the property of changing color depending on its oxidation state.

He was blocking the road.

Chromium is an important element in the production of steel.

Neodymium is one of the most powerful permanent magnets on Earth.

This system is very efficient.

This algorithm significantly improves the speed of data processing.

NASA is an acronym, which means 'National Aeronautics and Space Administration'.