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

His new car is black.

His black cat is very cute.

Chimpanzees are very intelligent animals.

Chromium is an important element in the production of steel.

I want to go to Croatia.

He is an expert in bibliography and works in many libraries.

The dark priestess used the power of darkness to save the village.

She was feared as a dark priestess.

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