This equation has homogeneity.

Einstein proposed the theory of relativity.

His actions always have a duality.

Radioactive elements are produced in nature and scientific experiments.

This software has forward compatibility.

This software maintains backward compatibility.

He was diagnosed with congestive heart failure.

His father fell into a persistent vegetative state due to a traffic accident.

Basic oxides react with acids to produce salt and water.

It is important for us to respect cultural diversity and understand each other's differences.