The character 'ominous' was written on that building, and it was creepy.

A new character has joined our team.

He is receiving treatment for obsessive-compulsive disorder.

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

This metal has very high malleability.

The sexology class is very interesting.

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

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

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

Cats are digitigrade animals, they walk on their toes.