I'm looking forward to meeting my friends this weekend.

The human immunodeficiency virus destroys the immune system, causing the body to lose its ability to fight disease.

The human immunodeficiency virus is the virus that causes AIDS.

The feline immunodeficiency virus can potentially have serious effects on a cat's health.

My cat has been infected with the feline immunodeficiency virus.

The Edgeworth-Kuiper belt is a collection of icy bodies located on the outer edge of the solar system.

Ergocalciferol is a type of Vitamin D2.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

He was playing by swinging the tree branch.

Mr. Shin always believes in moving forward.