To obtain data on the survival of HIV, laboratory studies usually use artificially high concentrations of laboratory-grown virus.
实验室里通常使用高浓度的人工培养病毒来进行研究,以获得关于HIV病毒体外生存的资料。
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During the course of this exhaustive study, Reznikova has grown so attached to her laboratory ants that she feels she knows them as individuals—even without the paint spots used to mark them.