他介绍说，艾滋病是由人类免疫缺陷病毒感染引起的。
He said that AIDS is from human immunodeficiency virus infection.
在15岁至19岁的男孩中，可导致艾滋病的人类免疫缺陷病毒感染率从1997年的10万分之1.3升至2006年的10万分之2.5。
Infections with the human immune deficiency virus that causes AIDS rose among boys aged 15 to 19 from 1.3 cases per 100,000 in 1997 to 2.5 cases in 2006.
这一高分辨率的三维结构阐明了这一分子怎样发挥功能并能够精确控制其活动，它具有控制人类免疫缺陷病毒感染和阻止癌症侵袭扩散的潜力。
The high-resolution structure sheds light on how the molecule functions and could point to ways to control its activity, potentially locking out HIV and stalling cancer's spread.
人类免疫缺陷病毒：在全球范围内，几乎2%的艾滋病毒感染新发病例是因不安全的注射而造成的。
Human immunodeficiency virus: Globally nearly 2% of all new HIV infections are caused by unsafe injections.
很多年来，全国很多高中一直依靠外来专家教授一些敏感话题，如人类免疫功能缺陷病毒感染和妊娠预防。
For years, many high schools around the country have been relying on outside experts to teach sensitive subjects such as the human immunodeficiency virus (HIV) infection and pregnancy prevention.
很多年来，全国很多高中一直依靠外来专家教授一些敏感话题，如人类免疫功能缺陷病毒感染和妊娠预防。
For years, many high schools around the country have been relying on outside experts to teach sensitive subjects such as the human immunodeficiency virus (HIV) infection and pregnancy prevention.
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