He was diagnosed with congestive heart failure.

The success of this project is influenced by a lot of uncertainty.

He is receiving treatment for obsessive-compulsive disorder.

The sexology class is very interesting.

In mathematics, it is important to examine the parity of numbers.

Sex chromosomes play a crucial role in determining the sex of an organism.

Sex chromosomes play an important role in determining the sex of an organism.

This metal has very high malleability.

This new software has backward compatibility, so you can use old version data without any problems.

This new software maintains upward compatibility with the old version.