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.

We have a responsibility to protect the biodiversity of the Earth.

This metal has very high malleability.

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