What is the role of Zidovudine

What is the role of Zidovudine? For many people this is a strange drug, and here's the introduction:

Zidovudine is an antiviral drug for AIDS or hiv-related syndromes and HIV infection. On March 19, 1987, the U.S. food and drug administration approved the drug. Zidovudine is the world's first received the anti-hiv drugs approved by FDA production, because of its curative effect, become the basic composition of "cocktail" therapy. The drug is antivirals and is highly reactive in vitro to reverse virus including human immunodeficiency virus (HIV). Within the virus infection of cells by cell thymidine kinase phosphorylation is three neat, phosphate, which can selectively inhibit HIV reverse enzyme, cause HIV chain synthesis end to prevent HIV replication.