This is a life cycle of a particular class of viruses called retroviruses.

这里是称为逆转录病毒的一种特殊病毒的,生命周期

耶鲁公开课 - 生物医学工程探索课程节选

HIV is a member of the family of viruses called retroviruses, and retroviruses all use RNA as their genetic material.

IV是一种逆转录病毒,所有逆转录病毒均以RNA作为遗传物质

耶鲁公开课 - 生物医学工程探索课程节选