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While it's well known that HIV is transmitted sexually, how the virus crosses genital mucus membranes to reach its targets in the immune system is less well understood. 虽然我们都知道性行为是艾滋病病毒传播的主要方式之一，但是我们却对HIV是如何穿过生殖器粘膜，最终抵达免疫系统中的靶细胞知之甚少。 Previous research has looked at biochemical measurements or morphology at various points during HIV transmission to investigate this process, but in a study published in the journal Cell Reports, researchers in France constructed an in vitro model of urethral mucosa in order to view it from start to finish. 在先前的研究中，科学家主要从生化指标或形态学的角度去研究HIV传播的过程，但在发表在《细胞报告》期刊的一项研究中，来自法国的研究人员构建了体外尿道粘膜模型，来观察整个传播过程。 | 
