His toughness supports him even in difficult situations.

His work has various facets, and each can be interpreted from different perspectives.

It's difficult to understand his real nature.

Rabbits are herbivorous animals.

Lions are carnivorous animals.

Owls are nocturnal animals, they are active at night.

This compound has high hydrophilicity, so it mixes very well with water.

Sexology is the scientific study of human sexual behavior and sexuality.

His work is full of ingenuity.

Education about sexual relations is important for young people to make healthy choices.